I am a bit of Noob at the PI but these could be the files you are looking for - getting confirmation from more experienced members would be very wise -

https://github.com/orangepi-xunlong/OrangePiH3_scripts

The naming conventions are different though.

I'll be checking them out tomorrow ( to late tonight ) I'll let you know how it goes.

I tried two of the scripts
fs_resize.sh : this worked well and I am now using the full space available on SD card.
install_to_mmc.sh : unfortunately this just returns "EMMC not found". I have be messing about with this though and I'm not convinced this is not down to me at the moment.

BrianG could you paste lsblk output from our device on which you have run script? as I understand currently running linux from emmc is kinda in work in progress status. i guess easiest way would be to boot kernel from sd card and specify that root is on emmc.

example
---
orangepi@OrangePi:~$ cat /boot/uEnv.txt
console=tty0 console=ttyS0,115200n8 no_console_suspend
kernel_filename=orangepi/uImage
initrd_filename=initrd.img
root=/dev/mmcblk0p2
-----

/dev/mmcblk0p2 is emmc partition 2 where all linux stuff should be copied from their provided image

No, Linux from eMMC works just fine (with Armbian), but Linux support for this board is rather under development.

to install debian