Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Many thanks @JimmyYang-MSFT
I did explore the option to create a private channel. The users would like entire organisation to access this channel and message them. which means the same issue and the entire organisation will get notifications.
We got around it with Create a group chat
[https://support.microsoft.com/en-us/office/create-a-group-chat-556d9323-75f4-4cbe-ba49-e65d7d8d53a8