This item is still on the backlog.
This feature request has now moved to “working on it”. The team is actively working on this request and I will share more details as they become available.
-WarrenJason Roth commented
I have the September 20th update and no dice. Still showing only just the single message as per #3 on the list.
Please check “Teams/Skype Consumer chat and calling interop” on the public roadmap at microsoft.com/microsoft-365/roadmap?filters.. for updates.