How to set the keycloak root path to not exposed

Hi,ALL

I set the reverse proxy for my keycloak service.
But after setting successfully, I found admin console of keycloak root Path can be accessed.
How can I set the root path in keycloak not to be exposed?

In the following doc, I only see the suggestions for setting the exposed path, and do not record how to set it. Do have any solutions in this regard?
Using a reverse proxy - Keycloak