You're right! If I remove all the other drives and leave the NVMe SSD, I can see it and access it with a windows 10 installer, and even make partitions.
The problem is that I don't want to install windows there, I already have a SATA SSD with it installed. I just wanted to keep it as storage, though after making the partition (not installing windows) I still could not see when I put the other drives back.
I'll try installing windows completely and see if it will show up as a drive when I run old windows.
edit: It worked, kinda, but alone. It looks like my Laptop stops recognizing the NVMe SSD when I have a SATA SSD installed at the same time.