Please check “Teams/Skype Consumer chat and calling interop” on the public roadmap at microsoft.com/microsoft-365/roadmap?filters.. for updates.Christopher J Pola commented
Microsoft: we see inconsistent results with Chat/Instant Messages being delivered btwn Skype users and MS Teams users. Is this a real feature or should we ignore the central 'Chat' functionality. What is the best practice? What is the formal roadmap for the products and the Chat feature being shared btwn them?
This feature is on the backlog. I will update you when we have more details to share.