Hi,
This may be caused by not finding the right driver. Below is the HP and Dell WinPE 10 Driver download links:
https://downloads.dell.com/FOLDER07703466M/1/WinPE10.0-Drivers-A25-F0XPX.CAB
https://www.dell.com/support/kbdoc/en-sg/000108642/winpe-10-driver-pack
https://ftp.ext.hp.com/pub/caps-softpaq/cmit/softpaq/WinPE10.html
For the driver A25 version and A29 version of the Dell machine download one, some users have reported that the A29 driver is not suitable for some machines, replace the A25 problem to solve.
Hope this will help you!