https://wccftech.com/download-macos-monterey-rc-now-available-for-developers-and-testers/

Good news everyone, macOS Monterey is finally available for download if you are a developer or a public beta tester.

This is the near-final release and will be available to everyone as is next week if no bugs are found. But, if you are a registered developer with Apple or a public beta tester, then you will be pleased to learn that this update is available for you, right now, over the air.