MacBook Air battery drains while off

Hi all, this is my issue

Since some months ago, my MacBook battery drains while MacBook is off. I turn it off on Sunday evening with battery 100% and when I turn it on on Friday it is around 20%.

Matter started with Sonoma

MacBook is a 2018 Air with normal Battery health

if I look at battery level in setting I can see a long green line between Sunday and Friday like MacBook was in stand by but I tell you: I turned it off.

I tried to reset pram, settings, and even reinstalled the operative systems: nothing worked

I am very unpleased about this situation, which I think it is due to software issues not to hardware

Anyone here with same issue and a solution that worked?

[Re-Titled by Moderator]