Hi Sayuri,
Normally netweaver user is like SAPSID.
Did you made configuration for which user SAPSID will be on remote DB?
Is it possible to access the data in different tenant by creating external view?
External view is the mapping for netweaver of a HANA View on netweaver schema.
So the exactly answer for your question is NO, but a view on netweaver that internally access other tenant is a probably YES.
Regards, Fernando Da Rós