https://www.bikeforums.net/fitting-your-bike/

There is a whole subforum on the topic of bike fit.

It's hard for me to imagine you still having a 90 degree bend in your knee on a 63 frame with the seatpost all the way up, but I am not in a position to dispute the claim.
Photos are always good. If you can manage to post a couple with you riding different bikes, it would surely help the discussion.
Is knee trouble an ongoing condition, or does it just arise with cycling?