Poco f5 PUBG Lag/fps HDR Extreme

Hey, Folks! Poco f5 is powerful but why does it lag not lag but Frame drop is fluctuating a lot! I'm not sure if it's grom the HyperOS or what, (I'm on global rom HyperOS 1.0.10 update) But my older phone Samsung Note 10 Plus with Snapdragon 855 runs Hdr extreme smoothly! is it because of poor optimization? Because to my knowledge Snapdragon 7+ gen 2 is should be more powerful! Even tho i play 80% + battery I can't even play 1 tdm match smoothly. Anyone else experience this and know the solution?? Also the 90 fps is jot stable ay all times!!! I don't know how is this possible!!!!?