Split from this thread.
I'm also wondering what to do about SharePoint.
However, there appears to be a path for Teams. Have you looked at the Microsoft 365 Certified: Teams Administrator Associate certification? (https://docs.microsoft.com/en-us/learn/certifications/m365-teams-administrator-associate) It at least addresses part of the Teams question.
Or are you looking for an MOS level certification for Teams? I'm not sure there's enough complexity to the program for that. But I could be wrong.
I do miss the MOS level certification for SharePoint. I earned that one for SharePoint 2010. But I doubt that the test is even available, even if much of it would still be applicable.