AFAIK there is no validation list for NVME drives. Basically anything should work but you do get what you pay for in the sense that cheap drives have cheap controllers and cheap NAND. Generally Samsung drives are considered some of the best but Intel drives should be pretty reliable as well.
But before you do that, you might consider removing from the array and completely wiping both drives. It's possible that just having a broken array is causing the weirdness you are seeing. If things come back online you can recreate the array. Going forward I'd recommend RAID1 for your system array just incase one of the two drives is starting to generate errors. You don't want to be in the position of losing and rebuilding your array multiple times because of a failing drive.
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