Automatic transparency for active and inactive windows

[24unix]

Would that be possible with AfloatX?

I currently use yabai, which works, but requires enabling "Displays have separate Spaces", which is bad, as I have three displays and like them to also as one Desktop.
A workaround was using Total Spaces 2, but that doesn't work anymore on Monterey.
Then I got back to using macOS shortcuts, but after the last update of Monterey they refuse one key to more than one space.

I just want to have e.g. active window 1.0 opacity, any other window 0.8.

Could that be done?