For me, Damien Bird is often an inspiration, as well as a real help with very specific things.
Here Damien shows how to update an event with new participants without each user receiving an email with the updates (new participant has been added) every time.
A few months ago I had exactly this request internally, because if a company event is pending, only the people should be added to an event if they had registered for it in order to always receive the regular updates from the event in their calendar.
You can see this video here on my blog because I have rated this video with 5 stars in my Youtube video library. This video was automatically posted using PowerAutomate.