You are thinking of the SPF-10G-T-X:
...according to the tool, that is only supported on the C9500-24Y4C and C9500-48Y4C:
How come a Cisco GLC-10GBase-T SFP+ will not work with the Cisco c9500-48y4c if it has 48x 10G capable interfaces? Are those interface designed only for optical sfp's? I hit a massive issue where I thought this switch was able to use 10G copper sfp's but none of them will work and they are getting errdisabled for not being supported.