</pre>
OK, Raspberry Pi Foundation release '''BETA version to support USB boot''' on May. 2202, please refer to [https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md Pi 4 Bootloader Configuration], TESTED!
More detail please refer to https://www.raspberrypi.org/documentation/hardware/raspberrypi/booteeprom.md and https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md