There's no way for anyone to know without examining the log files. There is no monitoring either, only log files since the process itself is controlled on the device itself.
See https://video2.skills-academy.com/en-us/mem/autopilot/troubleshooting, https://oofhours.com/2019/10/08/troubleshooting-windows-autopilot-a-reference/, and https://oofhours.com/2020/05/16/updated-troubleshooting-script-posted/ for info on troubleshooting Autopilot.