This looks like channels do exist, is it new (there's no date on the page) or do they not work as you'd expect? https://support.microsoft.com/en-us/office/the-new-chat-and-...
This looks like channels do exist, is it new (there's no date on the page) or do they not work as you'd expect? https://support.microsoft.com/en-us/office/the-new-chat-and-...