The issue: There has recently (once again) appeared a random "alarm" notification which displays as an alarm clock icon followed by a random time located in the upper left corner of my lock screen. The time on this alarm changes randomly throughout the day and is always a peculiar random time (e.g. 9:42, 3:14, 6:06) rather than something I would set in an application.
I say "once again" because this happened on my Pixel 4a and now my Pixel 6. I even wiped and reinstalled the OS from the factory image via adb tools. There are no apps installed that aren't from the Play Store and nothing, in my opinion, that is considered fringe or questionable.
Why is this seemingly innocuous alarm clock an issue? It seems to be some kind of upcoming alarm which is causing my overnight DND to become disabled, thus causing notifications for spam and other emails and texts to ring through and WAKE ME UP!! It's basically a form of torture.
I've reported this to Google support many times and (unsurprisingly) they've told me to reset to factory defaults to get rid of it rather than actually figure out what's causing it. I'm fed up and would like to know if it's possible to use the available adb tools (or something else) to debug this thing on my lock screen. If I can at least find out what application it's from then I can make an informed decision about how to resolve it.