Computer Configuration > Administrative Templates > Google Chrome
Both
HKLM\Software\Policies\Google\Chrome
Setting the policy specifies WebAuthn RP IDs for which no prompt appears when attestation certificates from security keys are requested. A signal is also sent to the security key indicating that enterprise attestation may be used. Without this, when sites request attestation of security keys, users are prompted in Google Chrome version 65 and later. Example value: example.com