Hello Laura_Quad
Thank you for posting in Microsoft Community.
It seems like you have an issue in regard to Microsoft Loop. Let’s work together in finding the best resolution to this issue.
When updating a Loop, using @mention is necessary to ensure that the team members who need to be notified of the update receive a notification. This is because not all team members may have notifications turned on for the Loop, or they may have muted the Loop. By using @mention, you can ensure that the notification is sent to all team members who need to be aware of the update.
Regarding your suggestion that all persons originally in the Loop should be notified of the update, this is a great idea and we appreciate your feedback. However, at this time, the feature you described is not available in Microsoft 365 Insider - Loop - Mac. We are constantly working to improve our products and services, and we will take your feedback into consideration for future updates. You may access the link below to report this matter, kindly go to the bottom part where it says "Feedback".
Click here: Get started with Microsoft Loop - Microsoft Support
We look forward to your next response.
Regards,
Jason Guer
Microsoft Community Moderator