I recently discovered Aurora, which allowed me to easily install Firefox on my Fire HD. Lots of other stuff too (better launcher, for instance) but I found it because the web just sucks without Ublock
I mean, Waydroid works fine with Aurorastore and even Playstore. Sure that may break, but all that capitalist "we buy licenses" BS of course costs money
The Amazon app store is the most mature app store outside of Google Play. It's not just as simple as converting the Windows store to Android because of course they would need to develop an Android version of every app in the windows store.