You can designate one or more team members as team owners. See this support article from Microsoft Support for instructions: https://support.office.com/en-us/article/make-someone-a-team-owner-09eb80c1-9f3b-4f6c-b6c0-45555d46ee2a
Team owners can add and remove members, edit or delete a team, and change the team picture. They can also:
Set team members' permissions for channels, tabs, and connectors
Control @[team name] mentions that notify everyone on the team
Allow @channel or @[channel name] mentions, which notify members who’ve favourited the channel
For more information, see Change team settings.
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