After I update my phone the flight mode is faded even I try to switch on & off again and sim card remove and insert again but the problem didn't solve. So please help on this issue.

I have a Samsung A52 mobile.I got a update of August after I had updated my phone it's draining so much battery. Is anybody else has same issue or only me facing the issue.Why it's draining so much battery after the update can anyone tell me?

In the pro mode shutter speed feature is not available only three feature is there will it come with that feature in any update or not.