Submit the output to Motorola, receive unlock_code.bin , then run:
: Fixes for persistent connection issues often found in earlier official Motorola builds. Motorola G72 Custom Rom
This is a major pain point. Stock G72 supports Widevine L1 for HD Netflix/Prime Video. Unlocking the bootloader usually drops you to L3 (SD resolution only). While some developers have found ways to spoof L1, it is not permanent. If you are a heavy streamer, do not flash a custom ROM. Submit the output to Motorola, receive unlock_code