Pixel 3 OEM gray out and baseband unknown

[scorpoin]

Greetings to All,

I'm stuck in a situation now. My pixel3 is on android 12 and OEM is disabled I can not unlock it. I tried manually OTA update and now baseband became unknow :'(.

OLD_Build_Version: 12.0.0 (SP1A.210812.016.C1
Intall New FULL_Offcial_OTA: 12.0.0 (SP1A.210812.016.C2

After adb sideload I lost baseband .

How do I fix my pixel baseband and enable OEM (bootloader unlock). Please help

Regards