delay messages for "busy" contacts
The contacts that have set their presence as "busy" or DND should not get notified/disturbed by the messages. If someone tries to send messages to a busy contact, MS Teams should ask if the message is really critical, with options "urgent, send now", "automatically send later when the contact is available", "dont send".
Its such a basic feature, it ought to be there
Dennis T commented
Voters for this idea may also want to vote for https://microsoftteams.uservoice.com/forums/555103-public/suggestions/37911193-send-chat-message-later-automatically-when-person.