Window adjustment 2023.1

Can I get some tips on adjusting the window to the back to cover the seal more. I cant get it up and down good to where it is good. But i cant get a good seal on the first part of the back rubber gasket but it dosent seem to want to go futher back. I have looked for the teg tips cant find it for framless. Any advice or post to an old thread that is still alive wpuld be cool.