In order for UEFI PXE Booting to work you will need to:
Ensure you have a 9.6 PXE Rep on the subnet (which i see you have done)
create the bare metal device first in LDMS
assign it to a provisioning task and then start the task.
This was taken from - How to PXE Boot devices with UEFI
One that is done, turn the device on and it should connect to the PXE rep and load into the PXE environment.
Note: We discovered that when making bare metal devices they were being assigned the Core's IP and thus never would connect to the PXE Rep.
To verify if this is happening to you, create a bare metal device, and once made go to the inventory/Network/TCPIP
If an IP is listed, you are encountering the same bug we are and should contact LD Support and reference ticket Case 00794012
The workaround for now is to use CLI on the core and run the following: "C:\Program Files (x86)\LANDesk\ManagementSuite\barescan.exe" -v name=DEVICENAME mac=DEVICEMAC