The root cause is probably entirely different. The device isn't online, because it was restarted and thus doesn't process MDM commands. She tried to unlock it using the wrong PIN code, hence the message. You are now in a deadlock situation, where you as a JAMF admin can't send the Clear Passcode command.
The way to resolve this, given that you have a policy scoped in advance, that restricts/disables USB restricted mode, is to plug in a USB ethernet adapter and get the device online using that method. If that's not enabled in advance, I know of no other solution than to wipe the device using DFU or similar method, and re-enroll.
And yes, USB restricted mode disabled does lower device security a bit, but for us it's worth it to avoid scenarios like these.
We do have USB disabled. I have moved forward with having her go to our HelpDesk and factory reset / re-enroll. Thanks for the information. It's kind of what I suspected. In limbo without being able to check in and receive commands.