It's a Flutter app served through app stores, but those have been bugging me with annoying requirements, the latest is Google removing the app from the Play Store unless I send a ridiculous amount of self identification documents.
Reasonable request or not, it's a never ending flow of bureaucracy and annoyance.
Are app stores still needed for reach? Will users just use an app-like website instead?
Definitely feel free to make it available elsewhere too (F-droid, GH, etc.) but if you want the app available to the general public, that's the way.
App stores are easier to reach prospects than the web because users already know where to go to install a new app...
That is more difficult on the web unless you have a very niche app (users are looking for your solution).