Unfortunatley I don't use Magisk at all. So this is not an issue for me.After updating to current weekly i got 3% standby drain.
In my case this was because of a magisk module (miui launcher fix).
Maybe miui "fights" against "old" magisk fixes, progress never stands still
My impression is that "others" draining battery are those modules running at root level, ie a few weeks
ago i fixed battery drain by clearing app data for "google play services".
Give disabling magisk modules a try if you're rooted (reboot afterwards), if no result: Well.... No idea
But following your advice, I just cleared all data of Google Play Services, Google Play, Google Pay, Google Services Framework. All Google. And rebooted. Maybe it will work. Thanks!