Teams Allows Users to Delete Chats

The Teams Delete chat option allows people to remove chats from their chat list. It’s a nice way to restore some order to a list that can be very cluttered with long-dead chats. Some subtle differences exist between leaving a chat and deleting a chat that you might need to explain to users before deploying the feature, which is controlled by a setting in the Teams messaging policy.

https://office365itpros.com/2022/11/16/teams-delete-chat-option/