There is a native FPS meter in Samsung phones running android 10. You need to activate it in developer options, GPU watch, and select OPENGL instead of VULCAN. : r/PUBGMobile
Game On! Unleash Your Android's Gaming Power with These Tips
How to enable developer options on Android and unlock cool new features! | nextpit
How to Boost Gaming Performance on Your Android Phone
What is the graphics driver in the developer option on our phones, and is it good if I enable it for gaming? - Quora
How to show more character body by changing the aspect ratio of your Pubg Mobille ? - Mobmet
Set PUBG Mobile Graphics Settings, FPS And More On Android, Here's How | Redmond Pie
FPS Counter PUBG Mobile
2 Solution for PUBG lag and stuck issues. - realme Community
Best Developer option settings for gaming
How to Fix PUBG New State Crash Problem on Launching the Game - TechPP