Power Platform has multiple portals for different tasks for admins. You will find an overview here.
Microsoft Dynamics Portals – overview
There are multiple portals with which you will interact. The following outlines the different portals and the most common tasks you perform there.
Direct navigation to Dynamics Admin Portal
Sometimes it is helpful to navigate direct to Dynamics Admin Portal, without entering the Office 365 portal. For example: I had the case, the redirection from Office 365 Portal to Dynamics Admin Portal does temporary not working.