The developer could grey out the option, and (upon triggering) advise the user to install Amazon app store (or F-Droid) and reinstall the app from there for ful

The developer could grey out the option, and (upon triggering) advise the user to install Amazon app store (or F-Droid) and reinstall the app from there for full functionality. I'm sure that Google would (not) love that, but linking to a curated page of apps with enhanced functionality on alternate stores would be useful in the many ongoing antitrust actions against the Play store.