This app has become part of the Nextcloud Server release packages.
It is no longer actively distributed via the app store, but when updating the Nextcloud Server the app will be updated to the latest version automatically.
Outdated page - now part of core Nextcloud itself.
Will ask for deletion (but not in issues on nc servers - too much of them there - will ask appstore admins instead) - even enterprise support (5 years) for NC13 will end in 2/2023.