It seems I am having same problem of not able to see the SSD in CrystalDiskInfo and SSD tool (I am using Crucial P1 NVMe) after I reimage the system as per the usage of new SSD.
So, does it work to display back the information if I change back to AHCI instead of RAID ? And does that change require the re-install of windows 10 from dell image? That's a painstaking task as that's quite a long while to take. ..