Use the hostname rabbitmq-amplified.internal to access the rabbitmq from other apps in your org. Let us know if you’re having issues with that.
In this part of the admin services config:
the handlers are processed in order. For a web app, terminate tls then handle http with:
handlers = ["tls", "http"]
You may not want that admin site to be on the public internet, which it will be with the current configuration. If not, something like tailscale or a vpn would enable remote access without exposing the admin page.