Question Something under 'Android OS' is draining my battery .......... again. Which process is doing this?

[Anderoider]

Is there a way to find out exactly which process under 'Android OS' (under Battery Usage) is fairly rapidly draining my battery? 'Android OS' is apparently using 46%

(the phone is a Motoroola G60S).

I had this issue a few weeks ago and it went away, but since an Android update it's come back again and I have no idea why.

Is there a reliable app (which doesn't harvest data) which will do the job?

Or any other method?

Thanks