Honestly, the screen being on doesn’t really worry me too much now, and I suspect an Android change in the past few releases has made it less reliable when the app tries to do it, because I’ll occasionally walk by and see that it’s on.

I’ve set the brightness all the way down and it sits up at ceiling height, on top of a wall-mounted network cabinet. I remote control it from my computer, using scrcpy (requires adb over TCP/IP).