So it may stop working if I try to deploy to live , idk, but I just copy pasted the dynamic expression “use a photo from the custom state in group A” into a reusable and it registers as a data error but nonetheless works on the free version preview.
From what I have read in forum in past, this works. But this is not officially supported.
It may stop working any time. It may be taken back any time. Or it may result into unexpected behaviour any time.