Hi,
I've tried to troubleshoot a Radius issue with "debug radius" and "show platform software trace message smd sw 1 R0 reverse | i 1812/" commands what works in C9300 (17.3.3) but this command does not exist in 17.9.x
DEMO-E2#show platform software trace ?
context Show btrace global context
counter Show counter value of modules
level Show trace levels
It should work based on the command reference:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/17-9/command_reference/b_179_9300_cr/tracing.html
