Yes, but online reports suggest the round trip time is a couple of weeks. I ended up ordering the cheapest possible AM4 CPU from Amazon Warehouse & returning it after updating the BIOS instead.
A tech forum that's local to me ran a 'CPU forwarding ring' - you could sign up to have a CPU sent to you, and after upgrading your BIOS you'd have to send it to the next person who needed it. I thought that was a genius solution.