Public clouds are separated from their gov versions, with gov versions using older, modified versions of what everyone else uses. public clouds ARE NOT fedramp compliant
I wouldn't call it the "best part." It sounds like you took the service focused angular patterns you were using before and shoehorned them into a React application.
How comfortable would you be allowing an outside dev to hack on your codebase without a _long_ conversation beforehand explaining the idiosyncrasies?