Please check “Teams/Skype Consumer chat and calling interop” on the public roadmap at microsoft.com/microsoft-365/roadmap?filters.. for updates.Mark Lutz commented
I will not be able to fully deploy this until we have the ability to interact with external users. We need to collaborate with consultants contractors and even customers. Skype integrations is required at least. Adding additional chat integrations would also be very helpful. This cannot come as a surprise and since it is already in Skype for Business I can't see why this was not addressed prior to release.