Well, I've got Beta 1. Not sure what I'm supposed to do with it
I'm viewing a strip of Provia 400. It shows a wavering positive interpretation which seems (intermittently) usable. I can click on the screen and it opens a negative capture of the strip in a Sharing panel. Or I click on the icon, and it opens Photos in Moments mode (but with no photos).
That's it. So far.