The Tenant admin is able to manage the static fields. Using the Field Management form, the admin is able to customize fields to be displayed on the homepage during signup.
The admin is able to edit the fields and even preview them except for the password.
While editing the password field, regular expressions should be taken into consideration. There is an option to enable/disable different static password policies.
There is an option to set the fields as mandatory or non-mandatory.
Except for the password, other fields can be previewed here.