did you check your device manager for NVMe drivers ? are they listed there ?
Is your SSD M.2 SATA or PCIe ? if it's SATA you need to attach it to
NVMe M2_1 located at the bottom of the board furthest from CPU closest to front panel connector Red color on the picture = Port number one of your motherboard and
BIOS>
Advanced > Onboard Devices Configuration: M2_1 SATA (best) or AUTO (
not PCIe)
M2_2 port does not support SATA mode.