Block Admin or Admin API User Creation on a Multiple Field Validation

As I understand it we can add built in or custom field validators which validate only a single field. These seem to be enforced on all entry points whether it be self-registration, Admin user create, or Admin API user create.

Also, I know and am able to add custom steps in the User Registration flow to do a check on any number of fields and scenarios but this is not applied to Admin or Admin API User Creation since that’s not the Registration flow.

Is there a way to do the same but through the other means of user creation?