@Gargron @fdroidorg That is incorrect and the GitHub issue shows it. The F-Droid team asked for .apk files of the Google Play build as it was compliant with F-Droid policy. Not a new flavor.
Mastodon made a change to the version they provided to F-Droid (the GitHub version) that broke policy. F-Droid even went out of their way to tweak policy in Mastodon'a favour to not require complete removal of the in-app updater, just a good explanation.