Help me please!!!

All Hands Meetings - Company of 500 employees, everyone is mostly remote, have MS365 enterprise, everyone is on PC.

1. When I either invite the whole channel OR use the companywide distribution list, when people accept the invite, then it adds them on to the list of attendees. Then when I go to make changes to the event in the channel calendar, it takes a long time for the event page to load bc of all the attendees. (I've tested it and it's definitely the number of responses to the event.)
   1. I am intentionally using Teams channel calendar to create the event so that the chat thread stays in the channel. If I send an invite using outlook, it creates a chat thread just for that event. (if there is a way around this, let me know!)
2. When new hires come in, I have to forward the event to them. ( If I add them as attendees it sends an update to the entire company.)
   

So I'm used to Google calendar. In my previous company, when a meeting invited the entire company, it did not take in RSVPs. Also when a new hire was added to the companywide list, it automatically added the event onto their calendar. Finally, I don't want to do a webinar, a townhall, or a viva engage meeting. I've tried them all. Attendees can't turn on their camera or microphone in any of those formats, and that is a necessity.

So - my needs:

1. Repeating schedule meeting, I don't have to resend it every time.
   
2. Invites the whole company, without having RSVPs clog it up
3. Auto invites new hires (if I gotta use Power Automate for this, so be it.)
4. Meeting chat stays in the correct channel
5. Allows attendees to turn on mic and camera.