The phone kept up and felt zippy which is really all that matters for multiplayer mobile games that aren't big on graphics.
This includes apps, photos, videos, messages, and everything stored on your phone.
Pretty fast even if it's not lightning quick.
In reality, you can play CoD Mobile with the graphics options set to the minimum level and do not expect a higher framerate than 30 fps.
Is it your best option? Video can record in up to 4K at 30fps.
Also, Once you follow the above steps and still face the problems, try connecting to different Wifi connections.