uefi cannot see the drive no more? usually if a drive fails, will fallback into read only mode. cabut and cucuk back again.
what mobo? if gt extra slot try slotting it into the other (make sure to check mobo manual first to see if slotting into another m2 slot will affect anything else or not, usually it will e.g. disabling a few SATA slot or dropping PCIe lanes on PCIe slot). if confirm fail, time to tukar lor. so far, I tested and used samsung 980 and 990 pro no issue. wd sn850x is good, kingston fury renegade healthy as well. BUT they're not cheap

nv2 is dramless, no matter how many ppl have pleasant experience with a dramless drive I still recommend against it. regardless of brands, all of them have QC issues once in a while, in big batches. samsung wd all kena b4

brand is not the problem, but rather model

Kingston NV series is budget model, made with whatever spare parts they have at the factory

KC3000 still very good

Adata... most are eh, SX8200 PRO has it's problems in the past but still an ok choice

how long was the Kingston NV2 used for? Kingston do make some reliable products, touch wood never had issue with their value rams running almost 24/7 for many years, also no issue with the highly recommended kc3000

maybe try samsung/ crucial/ corsair but go for better models instead of the budget series

it should come with 3 years warranty, claim rejected?

from what seller, that is not a problem lazada shopee if you buy from big name like all it, tmt, eit
i don have problem claim warranty kingston RAM that buy online