I notice the Google API supports to set attendees on a calendar event, yet this doesn’t seem to be supported in the HA Google Calendar integration.
This might be very powerful as it would allow to ‘create (forward)’ calendar events in external calendars which can’t be integrated into HA (eg in business calendars).
Would it be feasible to add the attendees email addresses as an optional field in async_create_event similar to the optional location field? The gcal_sync.model seems to support the attendees, so I’d hope it would have limited impact.