Power Bi Premium Workspace

Hello m_aj 

You can typically delete the workspace right away even if it is assigned to Premium capacity; there is no strict requirement to deactivate the capacity first

https://learn.microsoft.com/en-us/power-bi/create-reports/service-delete

other way is remove or reassign the workspace’s capacity if you want to reuse it elsewhere or ensure the Premium capacity is freed up before deletion

https://github.com/MicrosoftDocs/powerbi-docs/blob/main/powerbi-docs/support/service-admin-region-move.md

thanks