Your question is somewhat devoid of context... which ports on the FAS2554 are you specifically referring to and which specific Catalyst 9500 model is in question?
Generally, this is all standards-based Ethernet when it comes to NetApp products and Ethernet switches. If there is a common technology between them, they should "just work". NetApp does not maintain specific compatibility information for data networking ports and vendor switches.
All of the cable/SFP details for the ports on the FAS22554 are available on NetApp Hardware Universe.
