The following passage in Luke (mirrored in Matthew and Mark) explains that signs are only sought by “evil” people. Good people, instead, seek wisdom.
Common English Bible (CEB)
On seeking signs
27 While Jesus was saying these things, a certain woman in the crowd spoke up: “Happy is the mother who gave birth to you and who nursed you.”
28 But he said, “Happy rather are those who hear God’s word and put it into practice.”
29 When the crowds grew, Jesus said, “This generation is an evil generation. It looks for a sign, but no sign will be given to it except Jonah’s sign. 30 Just as Jonah became a sign to the people of Nineveh, so the Human One[a] will be a sign to this generation. 31 The queen of the South will rise up at the judgment with the people of this generation and condemn them, because she came from a distant land to hear Solomon’s wisdom. And look, someone greater than Solomon is here. 32 The people of Nineveh will rise up at the judgment with this generation and condemn it, because they changed their hearts and lives in response to Jonah’s preaching—and one greater than Jonah is here.
33 “People don’t light a lamp and then put it in a closet or under a basket. Rather, they place the lamp on a lampstand so that those who enter the house can see the light. 34 Your eye is the lamp of your body. When your eye is healthy, your whole body is full of light. But when your eye is bad, your whole body is full of darkness. 35 Therefore, see to it that the light in you isn’t darkness. 36 If your whole body is full of light—with no part darkened—then it will be as full of light as when a lamp shines brightly on you.”
Or maybe you prefer the passage in John that describes Jesus as happily providing miraculous signs to help people believe:
Common English Bible (CEB)
Jesus’ second miraculous sign in Galilee
46 He returned to Cana in Galilee where he had turned the water into wine. In Capernaum there was a certain royal official whose son was sick. 47 When he heard that Jesus was coming from Judea to Galilee, he went out to meet him and asked Jesus if he would come and heal his son, for his son was about to die. 48 Jesus said to him, “Unless you see miraculous signs and wonders, you won’t believe.”
Though, I would question why Jesus was happy to grant that guy a miraculous sign, and yet unbelievers and believers alike continue to live their whole lives without being given any such legitimately miraculous sign.
Some may say, that miraculous signs are everywhere, and that you just need faith to see them. But if you already have faith in the first place, you won’t need miraculous signs to believe in Jesus. Besides, miraculous signs have never been the sole right of God’s prophets. In the bible, even false prophets are said to perform miraculous signs.
If evidence (and logic) matters at all, I’d prefer the version in Matthew / Mark / Luke, over the one in John.