SSD NVME M.2 not detected on Ubuntu 21.10 during installation
Solution 1:
After some trial and error, the NVME drive was properly detected on Ubuntu 20.04 and 21.04. It is only not working on the latest 21.10 with default kernel version (5.13), while if I use an older one (5.11) it is working fine even on 21.10. I would say that the original issue is solved then, but unfortunately the wifi card (intel AX1675X) was still not working on any version... It turns out that installing backport-iwlwifi-dkms fixed this last issue. So now it is all good !