Opacity while moving

[b-aaz]

Hi I moved from xfce compositor to picom
And it's awesome 🙃

But there was a future in xfces compositor that I really miss it would let you set the opacity of a window while it's moving.
you could for example set the opacity to half and then when you drag a window around you can see the background
I couldn't find any fork with this future too
I'd like if this feature gets added
Thanks 😁😄