GDAP and the 'Printer Administrator' role

Hello everyone!

I see that the 'Printer Administrator' role is available in GDAP. However, we get "401 Error loading your content" messages when trying to access Universal Print in Azure. 

I checked the Workloads supported by granular delegated admin privileges - Partner Center | Microsoft Learn page but wasn't able to find a section for Universal Print at the moment. I believe a license is required to access this feature, which can't be assigned to an external identity, so I suspect that's our issue. A local tenant admin is able to access the universal print things without any issues.

Are we doing something wrong?
Can we look forward to seeing broader support for GDAP in the future?

Thanks!
-jon