Mac T2 Chip details check this post; https://support.apple.com/en-us/HT208862
SERVICE DETAILS:
1- When the Mac is on iCloud screen, do reset.
2- Do Jailbreak
3- Do Bypass with Mina T2 Tool
Download Here
3-After that choose WiFi And continue
4- You will see the options to install fresh macOS without problem,
install MacOS and done
Supported Mac Models List ( All T2 Security Chip )
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)