Microsoft recently published a very comprehensive support articel which describes which platform supports what features. You can read about activity feed, notifications, calendar, calls, files, meetings, live events, messaging, search, shifts, status, Teams and channels, Teams for Education.​​​​​​​

Source: https://pixabay.com/de/illustrations/lernen-hinweis-schule-betreff-3245793/
Source: https://pixabay.com/de/illustrations/lernen-hinweis-schule-betreff-3245793/

Conclusion, opinion and summary

Although the site exist the pace of change is fast, i.e. it makes sense to always watch out Microsoft 365 status updates, follow the common Microsoft Tech Blogs as well as monitor the Microsoft 365 roadmap.

Additional resources