Disable create (sign-up) for tenant in GCP Identity Platform - google-cloud-platform

Question

I have enabled multi-tenancy in GCP Identity Platform and unchecked "Enable create (sign-up)" in User Actions section of Identity Platform settings.
I have then implemented example sign-in page by following https://cloud.google.com/identity-platform/docs/multi-tenancy-ui this tutorial.
Specifically I have this snippet in my frontend code:
<script>
var ui = new firebaseui.auth.AuthUI(firebase.auth());
firebase.auth().tenantId = <MY-ONE-AND-ONLY-TENANT-ID>;
ui.start('#firebaseui-auth-container', config);
});
</script>
My problem is that it's still possible to create accounts in this tenant scope despite unchecking the "Enable create (sign-up)".
Additionally, if I comment out this line: firebase.auth().tenantId = <MY-ONE-AND-ONLY-TENANT-ID>;
I get expected This operation is restricted to administrators only. error. Therefore I understand that this setting has effect in general scope of my project.
Question is how do I achieve the same for my tenants if "Settings" page is only available for general scope. It displays <TENANT-NAME> is a tenant, you can manage <TENANT-NAME> and other tenants in <PROJECT-NAME>

Answer 1

Based on this article, when sign-up is disabled in the project settings, it should be mirrored with adminRestrictedOperation flag having set to true in Firebase. Disabling sign-up in the project settings without setting this to true will not have any effect.
Additionally, you might find this GitHub article useful. You can disable new user sign up with email providers by setting the flag disableSignUp.status to true. This will display an error message when new users attempt to sign up.