Problem on M2 Socket 3 of Asus PRIME X570-P motherboard

[satimis]

Hi all,

Asus PRIME X570-P motherboard
https://www.bhphotovideo.com/lit_files/589696.pdf
P-16 (motherboard drawing)

There are 2 "M2 Socket 3" on the motherboard for PCIe3 SSD.

I can use only one "M2 Socket 3", running Ubuntu 22.04, installed on the socket above "PDIEX16-2" slot (pls refer to drawing). When I add another "PCIe3 SSD" to the "M2 Socket 3" socket below "PDIEX16-2" slot, the 1st "PCIe3 SSD" couldn't be detected on BIOS

Please help how to fix the problem? Thanks in advance.

Regard