Slyclouduser, File requests is a new feature for OneDrive. Any new features must become generally available in Commercial before getting ported over to the sovereign clouds. A general rule of thumb, is a feature for an existing product that is already within the accreditation boundary will take 3-6 months after GA to release in the sovereign clouds. There are exceptions to the rule, such as requirements for FedRAMP assessments. At the end of the day, there is a public roadmap for such features found at http://aka.ms/m365roadmap. That said, I do not see this feature in particular.