This feature is on the backlog. We’ll update when we have more details.
As we announced at Microsoft Ignite 2019 this morning, we are excited to confirm that Multi-window capabilities are coming to Microsoft Teams, and will start rolling out to the public ring early next year!
Alex & the Teams team
Due to prioritization of other work-items this has been moved to the backlog. We will update when it is being actively worked on again.
The feature team has reviewed this item and decided to decline it at this time.