Thank you for your feedback! We are happy to announce that capability to allow specific presenters to manage breakout rooms is now available to users who have opted into Public Preview.
To see feature details, please visit https://techcommunity.microsoft.com/t5/microsoft-teams-public-preview/now-in-public-preview-presenter-support-in-breakout-rooms/m-p/2774821.
For details on switching to the Microsoft Teams Public Preview version, please see : https://aka.ms/TeamsPublicPreview.
We look forward to your preview feedback!