I also contacted another domain registration service to verify this price. They said that the domain transfer fee is $843 and that they have nothing to do with it, the pricing is determined by registrar(Google in this case).
Attached: https://twitter.com/EmirKarsiyakali/status/16014456975341649...
Even while writing this comment, they also responded from their own Twitter: https://twitter.com/Namecheap/status/1601447984775962625