Hope you don't mind if I do some of my own. I have a friend with a much better bible translation that speaks Hebrew. The English translation is especially clunky, because the language of the text is just constructed very differently than English.
"And a voice came from the throne, saying, "Give praise to our God, all you His bond-servants, you who fear Him, the small and the great."
6 Then I heard something like the voice of a great multitude and like the sound of many waters and like the sound of mighty peals of thunder, saying, "Hallelujah! For the Lord our God, the Almighty, reigns.
7 "Let us rejoice and be glad and give the glory to Him, for the marriage of the Lamb has come and His bride has made herself ready.""
so... how does this context make god out to be literally omnipotent? Because it calls god "the Almighty"? That's a bit of a stretch, wouldn't you say? Your own source gives the context, by the way.
"I pray that the eyes of your heart may be enlightened, so that you will know what is the hope of His calling, what are the riches of the glory of His inheritance in the saints,
19 and what is the surpassing greatness of His power toward us who believe. These are in accordance with the working of the strength of His might
20 which He brought about in Christ, when He raised Him from the dead and seated Him at His right hand in the heavenly places,"
Again, how is this saying god is omnipotent? It certainly says he is powerful, but not literally capable of everything conceivable and inconceivable.
""But at the end of that period, I, Nebuchadnezzar, raised my eyes toward heaven and my reason returned to me, and I blessed the Most High and praised and honored Him who lives forever; For His dominion is an everlasting dominion, And His kingdom endures from generation to generation.
35 "All the inhabitants of the earth are accounted as nothing, But He does according to His will in the host of heaven And among the inhabitants of earth; And no one can ward off His hand Or say to Him, 'What have You done?'
36 "At that time my reason returned to me And my majesty and splendor were restored to me for the glory of my kingdom, and my counselors and my nobles began seeking me out; so I was reestablished in my sovereignty, and surpassing greatness was added to me."
Same problem as the previous two, and as for no one questioning the actions of god in the bible, that blatantly happens on multiple occasions within the text itself, so either it isn't literal, or you have to consider it to be a contradiction. For example, Moses questions why he has been chosen by god.
""It is I who have declared and saved and proclaimed, And there was no strange god among you; So you are My witnesses," declares the LORD, "And I am God.
13 "Even from eternity I am He, And there is none who can deliver out of My hand; I act and who can reverse it?"
14 Thus says the LORD your Redeemer, the Holy One of Israel, "For your sake I have sent to Babylon, And will bring them all down as fugitives, Even the Chaldeans, into the ships in which they rejoice."
So, no one can undo what god does, and no one can usurp the authority of god. Still, that doesn't mean that god is omnipotent, merely that it is the most powerful being in existence... by implication.
""This is the plan devised against the whole earth; and this is the hand that is stretched out against all the nations.
27 "For the LORD of hosts has planned, and who can frustrate it? And as for His stretched-out hand, who can turn it back?"
28 In the year that King Ahaz died this oracle came:"
same implications as the previous quote; still doesn't say god can literally do everything.
"When the disciples heard this, they were very astonished and said, "Then who can be saved?"
26 And looking at them Jesus said to them, "With people this is impossible, but with God all things are possible."
27 Then Peter said to Him, "Behold, we have left everything and followed You; what then will there be for us?""
This is about people working with god, not god independently, and context drives it most towards salvation rather than items such as making a square circle, etc.
"And the LORD said to Abraham, "Why did Sarah laugh, saying, 'Shall I indeed bear a child, when I am so old?'
14 "Is anything too difficult for the LORD? At the appointed time I will return to you, at this time next year, and Sarah will have a son."
15 Sarah denied it however, saying, "I did not laugh"; for she was afraid. And He said, "No, but you did laugh.""
Oh, look, my namesake. I always did find it funny how my name is associated with a character that doubted god until they fulfilled their promise. In any case, this is another case of redundant question implying, but never actually stating, the power of god. At best, this is a very weak argument for god being omnipotent, and it might be a problem of translation as well. It seems to me more like "Woman, I made a human out of the dust of the earth. Do you honestly think I can't make a person appear in your dusty old womb?" XD
This is Job making the claim, throughout this drilling, god gives specific examples of what it can do, asking if Job can do them. It goes on for a while over the course of a few verses. None of it supports this idea that the biblical god can defy logic and make 2+2=5, beyond, perhaps, changing what 5 represents.
""And behold, even your relative Elizabeth has also conceived a son in her old age; and she who was called barren is now in her sixth month.
37 "For nothing will be impossible with God."
38And Mary said, "Behold, the bondslave of the Lord; may it be done to me according to your word." And the angel departed from her."
Similar to Genesis 18:14. You could take this as literally god can do anything, but the context doesn't lend to it very well. It makes for a weak argument, nor does it necessarily encompass everything. It's further complicated by the fact that the bible has two clashing accounts of angels coming down and explaining the coming of Jesus.
"he promise to which our twelve tribes hope to attain, as they earnestly serve God night and day And for this hope, O King, I am being accused by Jews.
8 "Why is it considered incredible among you people if God does raise the dead?
9 "So then, I thought to myself that I had to do many things hostile to the name of Jesus of Nazareth."
Basically, just a person wondering why people doubt that god can raise the dead, and nothing else specific. It implies that god is so powerful, that no one should be shocked by this idea. But, it doesn't imply or state in any regard that god can to literally everything.
"Then the word of the LORD came to Jeremiah, saying,
27 "Behold, I am the LORD, the God of all flesh; is anything too difficult for Me?"
28 Therefore thus says the LORD, "Behold, I am about to give this city into the hand of the Chaldeans and into the hand of Nebuchadnezzar king of Babylon, and he will take it."
This seems like a common redundant question that god asks whenever people express doubts in general. It doesn't literally mean god can make a boulder so big even they cannot lift it. It's the biblical god equivalent of saying "I got this, no worries."
"There is none like the God of Jeshurun, Who rides the heavens to your help, And through the skies in His majesty.
27 "The eternal God is a dwelling place, And underneath are the everlasting arms; And He drove out the enemy from before you, And said, 'Destroy!'
28 "So Israel dwells in security, The fountain of Jacob secluded, In a land of grain and new wine; His heavens also drop down dew."
It says god is powerful, and has some other interesting traits, but not omnipotent. No one is questioning that the bible claims god to be powerful, but people are questioning the omnipotence claim. Thus far, the majority of your quotes cannot even be interpreted as saying that, and given the pattern of god dispelling doubt with the phrase "is anything too difficult for me?", it is unlikely that it literally means god could make a square circle, or some other such nonsense.