I'll ask a couple of questions to see if there's an answer in there somewhere.
1. In your Restrictions Profile, do you have "Defer Software Updates for ## days" turned on? If so, turn it off and refresh the profiles.
2. Are you trying to do all the updates remotely? I ran into an issue that with a major update, you may have to physically tap 'Agree' on the Software update page.
3. Are you using Devices > Updates > select devices > Download Button/Install Button? If so, you do need to click the 'Clear the passcode(s) checkbox. From some experience, this will reset any passcodes and face/fingerprint IDs on the devices while allowing the update to run on a locked device.
4. Are the devices charged past 50% or plugged in? I can't remember the threshold, but the install won't run if the devices aren't plugged in or charged up past a certain point.
5. Are they connected to your wi-fi? Seems a silly question, but I had a couple that looked like they were connected. However, when we checked the physical device there was a connection error that was blocking all network communications. A quick Forget network and reapply wi-fi config and all was working again.
That's all I can think of right now. I will say that I actually had to enlist student help with teacher oversight to update a lot of devices in our 30 schools.
Good luck!
GB
Greg Bobbett
