Do we have a public calendar which one can follow?
This sounds like a good idea.
Public calendar for what? FOSS events, or just FOSS United Events?
Done - FOSS United events calendar on Nextcloud
At the moment, events have to be added manually to the calendar but this could be made easier/automatable e.g. if the ics files can be downloaded from the platform and added to the Nextcloud calendar.
This can be very well automated within nextcloud as well. Nextcloud utilizes CalDAV and webDAV under the hood. The forum also has a thread on adding events via curl requests. So, if curl requests are possible, automating it should also be possible via cronjobs (daily updating).
Iām sorry but it sounds easier to just update the calender manually once a week instead of setting up and maintaining all of that