M2 drive not showing

Hi, I have two Jetson AGX - one is running Ubuntu 18.04 installed with SDK manager. The other is running a custom distribution built with Yocto. Both have a Kingston M2 drive plugged in.

On the Ubuntu Jetson, lspci gives me the following output:

PCI bridge: NVIDIA Corporation Device 1ad0

memory controller: Kingston Technology Company

PCI bridge: NVIDIA corporation Device 1ad0

SATA controller: Marvell Technology Group Ltd"

and ls /dev | grep nvme gives me:

nvme0

nvme0n1

On the Yocto built Jetson, lspci gives me:

PCI bridge: NVIDIA Corporation Device 1ad2

Ethernet controller: Intel Corporation I210 Gigabit Network Connection

and ls /dev | grep nvme gives me nothing.

Does this suggest I’m missing something on the Yocto built Jetson before I can use the M2 drive? Or do I need to mount it manually somehow?

Any help appriciated!