Hello everyone,
the Nextcloud Social App finally works again! The entire design has been revised and renewed to meet the latest VUE standards. Your profile can now also be found on e.g. mastodon.social / mastodon.xyz, provided you mention a user (e.g. @nextcloud@mastodon.social) once.
The updated app is not yet in the App Store; If you still want to try it out, you can download the .tar.gz from Github and then activate it in the App Store.
I look forward to your feedback!