Armbianmonitor:
http://ix.io/2NYM
I recently bought a 64 GB eMMC module (chip on orange board) from Ordoid/Hardkernel but u-boot does not recognize the eMMC.
What I did:
installed the official Armbian_20.11.10_Odroidc2_focal_current_5.9.14.img.xz with Etcher on SD card
booted successfully from SD card, eMMC is accessible from within Armbian/Ubuntu
executed nand-sata-install to transfer the system to eMMC, which completed without error