You only have the one ssd drive is that right? Disk 0. Disk 1 seems to be a usb drive that's plugged in.
What I would do next, personally, is - on another computer (if you can access one). Download parted magic and burn it to a usb stick. I think it costs £14, but then you keep that usb stick as a "tool" you can use indefinitely. Boot from that. Select to erase the nvme drive. This erases everything on the drive and removes all partitions. Then it will seem as if it's a brand new drive and you can then just clean install Windows and it will set up new partitions and use the full 2TB drive.
When you install Windows, only disk 0 should be showing. I am not sure if you could just restore your image now, rather than a clean install because the image was made with possible existing issues (and when it was set to RAID rather than AHCI - but I'm not sure if that would affect the image or not as I'm not up on that side of things

).
But the quickest, easiest thing to do now, IMO is erase the drive, clean install Windows 11. It's a pain having to reinstall all programs and re-do all the windows settings - restoring your files shouldn't take too long, if they are backed up somewhere else.
You could "try" reinstalling the image after erasing the drive. That error you saw when trying to restore the image is sometimes when windows sees the recovery usb you're restoring from, as part of the system (eg if you had it plugged in when you also had a Windows 11 usb stick plugged in). So when you go to restore the image, make sure no other usb stick is plugged in. What you can do is a) plug in the usb with windows 11 on to reach the recovery menu then when you get to the point where it says restore from system image, unplug that usb and plug in the usb with the image on.
Erasing the drive is something I find helps with most things- it will automatically get repartitioned when you install windows or restore an image