Everyone who uses the M1 iPad with PUBG mobile has the same issue, myself included. It has nothing to do with apple, it’s a pure Tencent problem. Apparently the game has yet not been updated to support the new iPad, which makes the game think it’s an old device l, hence the low graphics resolution and low alternatives on settings graphics/FPS. U have to complain to tencent, however I believe there will be an update soon considering it’s an easy fix for them.