Hi Krishna,
Hub system can be at a higher SP level than that of backend system. But backend cannot be at greater SP than that of Hub system.
Is there a document/note describing this?
Each Fiori app has a prerequisite components in the "Fiori App Reference Library". That should cover any finer requirements.
I spoke of Fiori-like development - not implementation of SAP standard apps. That's a difference.
Best Regards,
Tobias