After a little tinkering, I found that holding back the following packages during an ` apt update` allowed for recognition of the nvme ssd:
linux-dtb-current-rockchip64
linux-image-current-rockchip64
linux-u-boot-rockpi-4cplus-current
I'm going to test further to see if it narrows down to one package.
Hey, thank you for this! I went straight to a new install of Armbian on my 4C+ and used the Github linked releases - a build of 24.5 - and found that the nvme ssd was not showing up at all under lsblk or df. Without your post I wouldn't have thought to try the archived versions!