Since I cannot comment I wanted to provide some reference material for the answer above.

The hd parameter is used to specific a specific Google Workplace domain to use with the account selector.

If specified, only Workplace accounts with that domain will be shown.

By adding "hd=*" (wildcard), it basically says any Google Workplace account will be shown, but not non-workplace accounts.

Reference: https://developers.google.com/identity/openid-connect/openid-connect