I play Genshin Impact (Play Store version), all High settings 45-60fps capped. I play with power saving mode ON (enabled automatically using Bixby Routines), so it doesn't overheat which can make the game stable and less stuttering. I also disabled GOS (Game Optimization Service) inside Game Booster, and used Game Booster Plus, reduced the render resolution slightly.
So far, it's been pretty stable especially in domains (smooth 60fps), but will drop couple frames when outdoor battles, rain weather, snow in Dragonspine, screen recording, etc. Minor stutters are inevitable. Other than that, no other major issue. My only issue is my never ending beef with wifi 😆.
My advice is try to keep ur device as cool as it can. Play infront of fan or aircond 😆
