Are you able to see/query data using your native Snowflake libname assignment through SAS code? It sounds like you can get to Snowflake metadata but not data. I think I'd pursue that, possibly as a SAS Tech Support case, and once that is proven working, follow up on the SAS metadata side of things. I am unexperienced with Snowflake, but in general it sounds like there needs to be a GRANT for SELECT
Carl Sommer - SAS Technical Support