Iphone 14 Pro Max 512g. I play most of the games listed in this thread and downloaded the ones I don't for testing.
Pokemon go- No issues
Wild Rift- No issues- But 14 not supporting 120 mode right now

Genshin- had to redownload. ran around open world for 15min no issue i see but dont really play this one.
Mario Kart- No issues- Don't play a lot just did a few races.
Brawl Star- Dled to test. Played a few rounds didn't seem to have a issue
beatstar- Dled to test. played 5 songs. All ran fine only issue was with opening a box seem to skip a frame or 2
maybe we can get a few other people with 14's pro's to test also and report back to see how big this issue is. Also what size models do you guys have? do you have issues watching videos or scrolling webpages/apps?