Most likely you received a OEM version of the Ryzen 5 3600x processor which means it isn't covered by AMD Warranty for 3 years. The place where you purchased the processor is the only Warranty you will be getting on that processor.
OEM Processors are bought in bulk and comes in plastic cases to the Retailer/vendor so it has no Official AMD Retail box nor Warranty.
While Retail versions come in a sealed Official AMD Retail box with or without CPU Cooler bundled. These have a 3 year AMD Warranty on it.
But to verify to see if your processor is truly a OEM version you need to send in the Serial Number to AMD Support- Warranty and see whether the Serial number is for a OEM or Retail version of the 3600x from here: https://www.amd.com/en/support/contact-email-form
I would upload the same photos you uploaded here when you contact AMD Support.