Amazon Seller signup stuck on Merchant Picker with no U.S. marketplace option

I’m trying to register for an Amazon Seller / Amazon Handmade account in the U.S., but I’m stuck in a redirect loop and can’t get past the Merchant Picker page.

Every time I click any Seller Central link, Seller Support link, Handmade signup link, or Handmade “Apply to sell” link, it redirects me back to the same Merchant Picker page.

The only marketplace options shown are UK, Japan, Egypt, Australia, and Singapore. The U.S. marketplace does not show up at all, so I can’t select it or continue the U.S. registration.

I also tried the Amazon Handmade application path exactly how support suggested:

Opened an Incognito/Private browser window

Went directly to the Amazon Handmade application page

Clicked “Apply to sell” instead of “Sign up”

But it still sent me right back to the same Merchant Picker page.

Amazon support said they may get back to me in around 6 hours, but I’m wondering if anyone has dealt with this before.

Has anyone had their account stuck where the U.S. marketplace doesn’t appear in Merchant Picker? Did Amazon have to reset/reroute the account, or is there a specific link/workaround that actually fixes it?