How do you buy an Azure Active Directory Premium P2 license in GCC (not GCC-High)?

Question

I have an active GCC account that I have purchased all of my Office 365 G1, G3, G5, and Dom & Int Calling plans on. However, I cannot find the Azure AD Premium P2 licenses on the list within Purchase services. I have been told that it should be on the list, but no one can explain why it is not. Again, this is on the GCC side not commercial (which works) and not GCC-High.