So for a while i’ve had this problem where any game i play on my phone the games get locked to 60hz.
Today i found a temporary fix for it.
So if you open your game you have to go into pop up view and then fullscreen again and then your hz should say at 120.
On League of Legends: Wild Rift it sometimes goes back to 60hz like when i load into a match but all you got to do is go into pop up view and fullscreen the game again.
Hope this helps.