Yes PXE Rep had both boot.wim & bootx64.wim. Had to reimage it for another test. If I booted PXE Legacy Mode it got the boot.wim, if selecting UEFI PXE Boot IPv4 I got no response from the PXE Rep. On the flip side , creating a USB boot media place bootx64.wim and this detected the pending Provisioning task and behaved as expected.
Regards