To enable Android for the FLX1 do the following:
- Go to Settings -> Android
- Enable Android
You can find Linux compatible Flatpaks, and how good they run on mobile here:
In the preinstalled Fdroid store you can find most open source apps for android.
The Aurora Store is an alternative to the Google Play store. You can install it from Fdroid and their you find all APKs that you would find in the normal App store.
https://f-droid.org/de/packages/com.aurora.store/
- Go to settings -> android -> installed apps -> settings -> launch -> apps -> the app you want to change -> Permissions