Wii games running slow Iphone 12 pro

Hi guys. I was looking for help online but I can’t find much information about my problem. I installed dolphin thru the Altstore recently but I’ve been having some problems running wii games. With gamecube it works flawlessly but for some reason wii games are literally unplayable. 15fps or less, choppy audio and from time to time it crashes or just gives an error saying that the emulated gpu has desyncronized. Any tips on how to make it run properly, or what setting should i use? Its odd because I’ve seen people run at 30fps on an Iphone 8. Thanks in advance :)