Teams - Assign a user role
Within Microsoft Teams there are two user roles: owner and member. By default, a user who creates a new team is granted the owner status. In addition, owners and members can have moderator capabilities for a channel (provided that moderation has been set up).
To assign a user role, in Teams, select the team name and click More options > Manage team. On the Members tab, you can add members and choose owners and moderators (if you have sufficient permissions).