[phyrrus9]

I don't know how grub probe works, but it shouldn't be surprising that Windows 10 doesn't have grub (dev/sdc1 | dev/nvme0n1p1), as for what you have on dev/sdb1 it doesn't say, but I wouldn't be shocked if it is another VM, which also might not have Grub or shares your main OS's Grub.

sdb is the drive that my linux build is on. sda and sdc are part of an array and won't detect anything, windows is on the nvme drive.