Hey @303nir
It doesn't look like C9300s are supported with Port Profiles/SmartPort. You will likely have to put in a feature request by reaching out to your account team or clicking the give your feedback button on the dashboard.
"SmartPorts are supported on the MS120, MS125, MS130, MS130R, MS210, MS225, MS250, MS350, MS355, MS410, MS425 and MS450 series switches"
https://documentation.meraki.com/MS/Port_and_VLAN_Configuration/SmartPorts#Requirements.2C_guideline...
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