@gdenton , I found this too. No idea how to run the config sections myself either.
I put up a post with what sounds similar to your issues, but my experience of Linux is from a dozen failed attempts (and one very slow success until it was rebooted) at getting Nextcloud running on a Pi4/8GB, so I’m not entirely sure that I’m not at fault.
Some stuff is visible under the user icon in the top right, Settings and Administration on the left. Overview can perform checks (and has some warnings I may be able to fix via config), so my system is running properly, just not available outside the LAN.