Uuuummmm...the Epstein Estate artifacts provided to Congress provide proof that he knew about Epstein having underage girls and that, apparently, based on Epstein's sentence in one email, he spent hours with one of them.
That, of course, doesn't mean Trump had sex with an underage girl during that time.
I am sure Trump was a total gentleman during that time and just spoke to her about her life goals.
But given Trump's history of sexually assaulting women (Jean Carroll, for which he was convicted of doing) and grabbing women between their legs without permission (video proof), I seriously doubt they just talked for hours.
So, the only way you can say there is no proof is because you are in denial.
Good luck on your proof crusade.