So, this is a multipath disk, whose parent is the nvme-subsys0 device, not nvme0 device. The latter is a PCI device, but the former is a virtual one. Some code to add slaves/holders relationships was added, but reverted. I will investigate any further discussion about this upstream, or look into how to relate those nodes in a way we can just fix this in initramfs-tools.
So, this is a multipath disk, whose parent is the nvme-subsys0 device, not nvme0 device. The latter is a PCI device, but the former is a virtual one. Some code to add slaves/holders relationships was added, but reverted. I will investigate any further discussion about this upstream, or look into how to relate those nodes in a way we can just fix this in initramfs-tools.