"We're working hard to get Loops approved for the Apple App Store and Google Play Store."
https://joinloops.org/join-the-beta
What about F-Droid? Anyone downloading apps from there can likely cope with a clearly labeled beta version. Or you could set up your own F-Droid repo for beta versions.
Also, what about Mobile GNU distros like Mobian, postmarketOS, etc? Will there be a version of the loops app for them?