Is your feature request related to a problem? Please describe.

It would be great to reference/link a particular appointment using the smart picker, e.g. in a page in collectives.

Currently it's only possible to reference a full calendar by pasting the URL to the calendar (not via smart picker either, see #7103).

We had a Nextcloud Collectives user meetup recently and several people reported that it would be helpful for them to be able to reference appointments in a Collectives page.

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Additional context

No response