Accessing and using Microsoft Teams on smartphones and tablets across platforms
Hello everyone,
Because Microsoft Teams is a more complex application than other Microsoft 365 apps, it may require additional development, testing, and coordination between both Microsoft and Apple before full support for the iPhone Duo experience can be released.
If you'd like to help bring more attention to this request, please kindly consider "voting" in the feedback thread shared by the OP below. Community feedback can help the product team prioritize this feature for a future update.
https://feedbackportal.microsoft.com/feedback/idea/2fef0963-d5dd-f111-bda1-7c1e52baf49b
Thank you for your kindness in this matter.