Controlling settings, permissions, and membership within Teams and channels
Dear Seema,
Good day.
Thanks for posting in Microsoft Community.
Regarding your query on Approvals notification stopped working in "activity" feed. Please understand that this query is outside of our support boundaries.
For you to be assisted properly, please reach out to Microsoft Q&A under the tag "office-teams-app-dev" by visiting this website All Questions - Microsoft Q&A; I am sure that our experts from that team can address your query effectively and accurately.
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Sincerely,
Simbarashe | Microsoft Community Moderator