I did a search and found this SSD utility from KIOXIA: [URL] This utility. like Samsung Magician, allows you to update the firmware on the SSD. I don't know if it will work with your OEM drive. Also, note that the web page says the SATA controller should be in AHCI mode. I know that for Samsung SSDs, Samsung Magician also requires AHCI mode. Dell sets SATA operation at the factory to RAID. You cannot just change SATA operation in the BIOS from RAID to AHCI because Windows is installed in RAID mode. You either had to reinstall Windows after switching to AHCI in the BIOS or use this procedure to switch Windows from RAID to AHCI: [URL] Unless you have a special Dell warranty, the limited warranty does not cover software or software issues.  Note that in the procedure, the SATA operation change is made half-way through the procedure.
I have skimmed through the Dell Support Utilities that came with my Dell XPS 8930 computer that has a 512 Gb KIOXIA NVME SSD as its system drive.  Any diagnostic tools for the hard drive seem to be very uninformative blackbox PASSED or not tools with no real report on the state of the SSD.  In contrast, I have installed a Crucial and a Samsung SSD to replace mechanical hard drives in older laptops.  Both non-Dell SSD's came with great management utilities that in particular tell me what % of the write life of the SSD I have used up and the reports are sensitive to enough decimal places I can actually tell if anything I'm doing, say in machine learning, is chewing up a substantial amount of SSD write-life on a day-to-day basis. Is there any SSD management utility from Dell or KIOXIA that can be used on a DELL XPS 8930 Special Edition without violating the Dell warranty?  I have also inquired through a Service Request to Dell but sometimes community members are more knowledgeable than Support personnel....   
XPS 8930, KIOXIA NVMe SSD, management utility available