The biggest surprise I had in attempting to distribute my first Android app is how difficult it is to get beta-testers through the "standard" channels. It requires a 1 week review and 25 beta-users invited by email addresses

In contrast, Apple has a ~48 hour turnaround for reviews before you can upload to TestFlight and distribute a beta with a link

Not sure if I am in some "trusted developer" cohort on iOS but not Android - but the difference was enough for me to stop trying on Android