Unlock Bootloader Via Termux [better] Online

The target device will likely show a confirmation screen. Use the Volume keys to select "Yes" or "Unlock" and the Power key to confirm. Important Considerations

A user tried to run fastboot via Termux on a Samsung Galaxy S21 – Termux threw permission denied for USB device nodes. The phone remained locked. unlock bootloader via termux

Follow on-screen prompts on your device to confirm. The target device will likely show a confirmation screen

Happy customizing!