If you look at any profile page, it’s the classic Mastodon layout: https://veganism.social/@mascottus

The probably just customized the home page

If you really want something a bit less austere than Mastodon you can have a look at https://iceshrimp.social/

Both could work, in a different way.

Nextcloud is more like a shared agenda, where you need to explicity invite people to events.

Mobilizon is more like Facebook events, where anyone with the link can say they will attend.

You might even have both, a Nextcloud for the members of the org and a Mobilizon as the public events

If they could encourage it at the countries level that would be nice too.

Some German and NL public services have Mastodon accounts IIRC, that’s a first step.

!article_interop@lemmy.ml