Connecting to internal URL

Hmmm… I don’t have it… Are you running HassOs or what?

Supervised but that’s irrelevant. It’s the top option i settings. Tap on your login name and it’s right there

You mean mobile app settings? If yes, well I don’t have that chance to tap on my name… About connections i only have the chance to change internal and external url and the SSID of my WiFi…
Sorry, maybe I don’t understand well what you mean.

After triple checking the guide and my settings, I found a setting in my Asus router UI that seemed to solve this for me: Forward local domain queries to upstream DNS: on. It was off by default. I use Nabu Casa for external.