Two options: 1.  Change the drive mode from IRST to AHCI in setup (F2 at powerup) or, if you want to keep the drive in RAID/IRST mode, 2.  Install the IRST install-mode driver. [URL]#:~:text=Go%20to%20the%20Dell%20Drivers,have%20saved%20to%20a%20computer.  
I have the SK Hynix BC501 NVMe 256GB SSD and need to replace it with 1TB SSD due to capacity issue. I bought Kingston SNVS1000 PCIe NV1 NVMe M.2 SSD but not able to install Windows as drive not detected and got BSOD. Any advice would be appreciated.
Area-51m R1, replace main M2 SSD