Sorry, I meant that I have no idea if the display is working, as I don't have one attached. The HA installation is definitely working!
Oh yeah. I would definitely not do a long distance update if I can avoid it. A few years ago we took a 28 day road trip, and the HA at home stayed completely un-updated during that time. (I actually have two setups, one is a virtual machine on my Linux server at home, and the RPi is in our rv.) I rarely have issues with updates, but I wasn't about to risk it.
For the rv setup, I struggle because the rv doesn't have a consistent wifi network. At home it uses the home network, but we'll often use campground wifi or phone hotspots while traveling. We have and used to use a Starlink setup (especially during that long trip) but I'm not giving that jackass a dime if I can avoid it. But Starlink really is the best solution.
And HA doesn't remember more than one wifi network at a time, so if I change it to a campground, then I have to change it back when I get home.