Hello,
I did what @MeatWar suggested to @Rikke_Cardoso for a Dell Inspiron 3847. However I have not flashed my firmware mod yet because I am not certain that I did everything right and this is the first time that I am attempting a bios mod.
My journey so far is outlined in my reply from today in the howto guide
https://winraid.level1techs.com/t/howto-get-full-nvme-support-for-all-systems-with-an-ami-uefi-bios
which @MeatWar linked as his second source of information.
@Rikke_Cardoso If you are feeling lucky you might have a look at what I did, yet I give no guarantees, so use at your own risk.
Kind regards
N