Is there any way to automatically have the apps in the TrueNAS catalog update themselves during a window (e.g. 5 AM Central Time when I’m very likely to be sleeping) without human intervention?
You can setup a watchtower custom app
+1 for watchtower, been using it for a little over a month now, set up to install updates once a week at a specified time and then get an email on whats been updated.