Read instructions :
HFZ MACBOOK ACTIVATOR EFI BYPASS T2 New iBridge  + OLD iBridge (Data Saved) 

1 - Install Apple Configurator and HFZ EFI BYPASS 
2 - Put locked mac into DFU MODE
3 - Press Unlock EFI 
wait for the process to finish 
NOTE:
If fail to execute the process connect to apple Configurator and select revive mac wait for the mac to be updated to the latest T2 bridge  

This is only for T2 Macs:

iMac (Retina 5K, 27-inch, 2020)
iMac Pro

Mac Pro (2019)

Mac Pro (Rack, 2019)

Mac mini (2018)

MacBook Air (Retina, 13-inch, 2020)

MacBook Air (Retina, 13-inch, 2019)

MacBook Air (Retina, 13-inch, 2018)

MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)

MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)

MacBook Pro (16-inch, 2019)

MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)

MacBook Pro (15-inch, 2019)

MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)

MacBook Pro (15-inch, 2018)

MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)

EFI LOCK