Part of a passwordless push that started years ago
https://www.bleepingcomputer.com/news/security/google-starts-rolling-out-passkey-support-for-google-accounts/
Google is rolling out support for passkeys for Google Accounts across all services and platforms, allowing users to sign into their Google accounts without entering a password or using 2-Step Verification (2SV) when logging in.
"We’ve begun rolling out support for passkeys across Google Accounts on all major platforms. This means users can now take advantage of passkeys across Google Services for a passwordless sign-in experience," said Google product managers Christiaan Brand and Sriram Karra.