We are in the GCC with a G3 account. We are using PowerApps (which just recently split the development web site to a completely different url) and SharePoint. Previously, (when our PowerApp was at (make.powerapps.com) I could embed the PowerApp into a moder SharePoint page using the "PowerApps (Preview)" web part, and it worked just fine. Since Microsoft moved us to the government PowerApps url (gov.web.powerapps.us) I can no longer embed PowerApps and I get a message "The application '<redacted guid>' could not be found in the tenant '<redacted guid>'. Session ID: <redacted guid>". If the answer is this feature isn't currently available to government tenants, then I will accept that and wait. But, if there is a technical problem with out SharePoint or PowerApps, I want it fixed.