Add events to teams channel calendar without notifying people

Hello niamhb1430 

welcome to the Microsoft community, my name is Recep I'll be happy to help you today.

I understand that you want to add events to a teams channel calendar, without it becoming a meeting and notifying people.

1.Kindly create a SharePoint page and add the group calendar to that page.
2.Create a new tab in the channel that links to the SharePoint page you just created.
Instructions for those 2 steps are here: https://www.youtube.com/watch?v=i543O6vMNt4&t=1s

3. users need to use Outlook to add events to the group calendar. Everyone will see the events,
they'll appear on the SharePoint page, but no one receives any meeting invites or notifications at all.