I am sorry, I can’t find where I explained it, so I’ll give a tl;dr here:
Once I reconnected Fedora’s SSD (in the GT 1030 PC), Grub2 was no longer selected as “preferred option” (Windows just auto-started alone), and since the BIOS is a 2013’s office PC’s, the easiest way to repair this was to re-install Fedora…
Now on Grub2 I have all the Fedora options, the W10 options, and the “get into the BIOS” option.
This means that older PCs may require different ways to dual-boot with Windows and Linux,
but here’s the important part for this context:
My Asus B450 Plus can use ReBar only if the NVMe alone is where the UEFI/EFI “boot thing” is installed…
This means that I’d’ve to EITHER install W10 first, with its EFI on the NVMe and the OS on the 240gb SSD, or Fedora on the NVMe, then W10 on the SSD, and then repair (installing once more) Fedora on the NVMe to “repair” what Windows would break.
Since I’m not in the best of health and Windows is not crucial for me, I just gave up for now, waiting for somebody to drop an answer in this chat.
If I can install W10 without it trying to kill Fedora, or needing me to re-install Fedora, then good. Otherwise, I’m just gonna use a VM…