Is there a port reference for built in integrations, or is this only for separate addon containers?

Is there by any chance a port to reference for the built-in shopping-list integration? I know that saying that it is built in probably means that it is only accessible through port 8123, but if there is a separate port that it can be accessed from this would tremendously help me in creating a “send to homescreen” app.

currently when I create a send to iphone homescreen app this only is created with the base url of homeassistant.local:8123 and it comes up by default to “lovelace/default_view” instead of homeassistant.local:8123/shopping-list, any config ideas are welcome as I’ve tried NGINX through my Cloudflared, but to no avail yet! TIA!!