I already installed that app even in also installed accu battery and battery guru

And after analyze your both pictures i noticed that in one ui 8 your power saving mode is on ,and battery is use only 3 and scores are higher and in one ui 8.5 your power saving mode is off and battery is use 6 and scores are also low means one ui 8....

Yes its heat when I use it when fan is off and in direct sunlight and when I play game then it heat even in ac room

And can you please also send geek bench scores

Thanks to inform bro because I am still on one ui 8.0