16 Some Pharisees and Sadducees who came to Jesus wanted to trap him, so they asked him to perform a miracle for them, to show that God approved of him. 2 But Jesus answered, “When the sun is setting, you say, ‘We are going to have fine weather, because the sky is red.’ 3 And early in the morning you say, ‘It is going to rain, because the sky is red and dark.’ You can predict the weather by looking at the sky, but you cannot interpret the signs concerning these times! 4 How evil and godless are the people of this day! You ask me for a miracle? No! The only miracle you will be given is the miracle of Jonah.”
Only those who hated Jesus demanded a miracle. Jesus would perform them without asking for those who loved Him. Which side of the fence are you?
When Jesus was heading to his crucifixion He was given an opportunity to save himself. He refused because the one involved hated him.
8 When Herod saw Jesus, he was greatly pleased, because for a long time he had been wanting to see him. From what he had heard about him, he hoped to see him perform a sign of some sort. 9 He plied him with many questions, but Jesus gave him no answer.
And, why should Jesus give you a sign/miracle?
No one got saved by them. They were always saved by having love for the Lord of creation.