A lot of historical figures get mentioned by contemporary writing of that period- the more important that person is the more information can generally be found. Yet Jesus who, even if you ignore the miracles, should have been an important spiritual leader wasn’t mentioned.

There is next to no evidence of Jesus Christ unless you count Christian sources, which have a bit of a bias.

The Romans for example were big on book keeping, yet no mention of Jesus can be found.

The existence of Jesus is possible, but far from certain - of course that’s something Christians don’t like to hear and the Christian church actively fights.