I have the same problem with my new ipad pro 2021 M1. Looks like there is an issue with resolution compering to my paid pro 2018. I used the same account on my 2021 ipad pro as I have on my 2018 and textures are not great, and on top of that buttons positions I had customized all over the place. Position of the buttons are not the same even if using the same account and layout. Hope either Apple or PUBG can fix the problem.