The proof went to currently unavailable. Hmm...wonder if mintage will be topped out at 80,000 for it?
That's not the U.S. Mint - govmint.com is a private company. You want https://catalog.usmint.gov/coin-programs/american-innovation-dollar-coins/ It appears proof and uncirculated are both still available but the proof is on backorder until late February (almost March).