I personally can't wait for passkeys to remove the infuriating path of: unlock pw manager to get username -> click next -> unlock again now that the pw field is available. That's been the worst regression since the mainstreaming of sso
Why do some sites not show the username and password field at the same time?
- stupidly to prevent username saving
- decrease credential stuffing
SSO. When your service has accounts where authentication goes through SSO, showing a password field too those users doesn't make any sense. So they just ask for a username/email address, then either redirect through SSO (if applicable) or ask for a password if it's not an SSO account.