I am happy creating an eMMC flasher that flashes the eMMC but is it possible to create a version that takes the current bootloader and flashes that also?
Are you flashing through USB or via SD card?
Via USB, you have /dev/sdb access to the entire eMMC device, and you can put whatever you want onto it.
via the SD card. My thoughts were if the update_bootloader.sh script can do it why can’t the eMMC flasher?