Sending, receiving, and organizing email in Outlook.com
Hi!
Welcome to the Microsoft Q&A forum.
First, do this simple test so I can narrow down the issue.
Have someone/anyone send a new meeting invitation from Google Calendar directly to your Microsoft 365 email address.
Next, you need to check Outlook.com in a browser and sign in. Check all folders starting with your Inbox, Junk, and Deleted items. You can also use the Outlook search box and search for the meeting subject.
Please let me know when you have done this test so I could find out what is next to do.