Haha awesome. I haven't found it in the Bible yet that the world was flat, but if I really saw it in there, I might believe it even.
God did pull me up into the heavens once, I got to see Earth from above. It was round. I do not recall if it was flat, though, but I saw it, and it was round like I had always been shown. When I saw the universe though, that was amazing. God showed me that the Earth was in the dead-center middle of the universe... but I had no idea that science had already discovered this in the WMAP data. Study the "axis of evil" in the WMAP data.
They figured out there is a big X going through the entire universe, and this big X is centered on the Earth.
Having seen the universe, I have some idea why it was a big X like this, has to do with galaxy arrangements, but I'm not sure if science has figured that out yet.
But when I got up to heaven and saw the Father in a vision, that was the big thing! He wore the whole universe like a cloak. And I was a lost person seeing this!!! I had no idea it was in the Bible, blew my mind when I read it: Hebrews 1:10-12
And then when I told Christians, they all balked, "No man has seen God!"
They're fools and didn't bother reading the whole council of God: All things have been committed to me by my Father. No one knows the Son except the Father, and no one knows the Father except the Son
and those to whom the Son chooses to reveal him. - Matthew 11:27
You can see Jehova just fine if Christ chooses to reveal him to you, which is what happened.
But I personally, based on that vision, and that scripture says the Earth is round, I understand that the word "round" can refer to a circle, or a 3d ball shape. Round has no preference for 3d round or 2d round. I can say a ball is round.
He sits enthroned above the
circle of the earth, and its people are like grasshoppers. He stretches out the heavens like a canopy, and spreads them out like a tent to live in. - Isaiah 40:22
Circle:
https://www.blueletterbible.org/lang/lexicon/lexicon.cfm?Strongs=H2329&t=KJV
If you look at the Hebrew-Chaldee Lexicon, the word includes sphere.
Why people interpreted circle or round as flat, is a tradition of man, not God.
That said, I follow the geo-centric model for creation and the position of the Earth, but this is a complicated topic, because there are multiple ways geo-centricity could be real.