Microsoft Teams 商務版中與工作相關的其他功能和問題
Hi Chao-Chun,
I'm afraid at this time, is not available yet. I strongly recommend submitting a request for this highly useful functionality at https://aka.ms/TeamsFeedback or from the Teams app, select 'Help' > 'Suggest a feature'.
Or you can try searching for some available third-party timer apps (from Teams) that might suit your needs.
However, if you're referring to a meeting timer, I invite you to upvote an active request from the following thread:
https://feedbackportal.microsoft.com/feedback/i...
Best regards,