Will the fastboot boot ramdisk command boot the U-boot secondary recovery to boot from usb/ sd card without mods?

Of course it has to be signed and not exceed a size-limit, but I think that custom roms or os’s should come to a bigger audience without the limiting security and guarantee risks, disabling the ability to update for example.

I like u-boot because it’s used by multiple os like chrome os and linux.

I hope one day a u-boot ramdisk would available for various android gaming devices using fastboot.

Then U-boot can then detect the usb/ sd card and fire the os.

Would this be possible?

Edit: Ofc not on Samsung, not even utilizing the fastboot mode.