I got my 12 pro max yesterday and I have been gaming on it since. I was really surprised when I observed frame drops during fights, I thought it might be a related to pubg and I tested with other games. Genshin Impact, even Asfalt 9 becomes laggy after 10 minutes of play. Compared to my previous 11 pro, I can confidently say that 12 pro max overheats during games. I updated to 14.3 version but the same issue, nothing is improved on my iPhone.