It's even worse than it appears..
Pixel 6 Edl Mode
has strict anti-rollback features in the bootloader that prevent flashing older, potentially vulnerable firmware, even in low-level modes.
echo 'SUBSYSTEM=="usb", ATTRidVendor=="18d1", ATTRidProduct=="d001", MODE="0666"' | sudo tee /etc/udev/rules.d/51-edl.rules sudo udevadm control --reload-rules pixel 6 edl mode
Unlike OnePlus or Xiaomi, Google does distribute the necessary prog_emmc_firehose_xxx.mbn file. You must extract or obtain it unofficially (security risk). has strict anti-rollback features in the bootloader that