You can control who has the ability to create Microsoft 365 Groups.

The following Microsoft article gives you the steps to turn off the ability to create groups in all Microsoft 365 services that use groups: Outlook, Planner, SharePoint, etc.

https://docs.microsoft.com/en-us/microsoft-365/solutions/manage-creation-of-groups?view=o365-worldwide

Microsoft Teams is also a part of Microsoft 365, which means that a Microsoft 365 security group set up to limit certain users from creating Microsoft 365 Groups will carry over to Teams, as per this Microsoft guidance.

Only the users who are in the dedicated security group that you create as part of this procedure will be able to create groups or teams in these apps.

It is recommended that you also read and understand the below mentioned FAQs in the Microsoft article.

• Do admins need to be added to this group?
• Am I limited to a single security group?
• Why it's important to control who creates Microsoft 365 Groups
• Editing an existing Group setting object