Yes I do have win10 bootable. I just got to troubleshoot section and managed to run command line with dispart utility. I typed in
like you said and I can see my NVMe in there. Status online and GPT selected.
list part command gives me back 3 partitions:
Partition 1 is Type System 300MB
Partition 2 is Type Unknown 300GB. This is my Linux partition I'm pretty sure.
Partition 3 is Type Primary 175GB.
So the drive is alive and all and I can be spotted in diskpart utility. But is not listed as a block device in Linux. What does that mean and how do I proceed from here?
At least now you know the drive is alive outside of bios.
Diskpart is not the best at identifying Linux partitions iirc. So I would start by running some recovery tools from a Linux live media. Try to recover partition table first. Hopefully that is all that is corrupted. Since Manjaro live is being mean, test a different distro if you still can't see the drive there.
If you don't have any vital data stored or have backups, you can consider to wipe the drive and start from scratch.
(After sel disk # in diskpart you can type clean. Fair warning: this will wipe the boot sector of your drive without asking for confirmation)