To post #120 ("paper defense" moved to the ms store) ... it's not too hard to access any free item in the store from a different site or method, and then you can pick apart the executables (x64, x32, arm, etc.) and the needed libraries (vclibxxxx, etc.) ... with these in hand, run the program on any reasonable os.
#1 ... see if the item is also on github, like "Windows Terminal". If you can get the item there, easiest of all. Some things are dev'd on github, and then packaged up and pushed to the ms store.
#2 ... get the "product id" of the ms store item. take that to the site(s) that will translate the id into the actual files that make it up. With the same files downloaded that are "locked" behind the ms store, now you can test running them on any other recent os (win7, etc.)
If you'll google accessing microsoft store programs offline (using product id), you'll find the same methods I was successful with. I ripped the ms store off of my win10 machine some time ago (using powershell), and when I wanted to get at Windows Terminal, I used both of these methods to get at the actual files.
Not a perfect system, but a workaround that gets me at some things (many things?) now supposedly "locked" in the store ...