What I want:

To boot into a BTRFS snapshots from rEFind boot manager.

Additional Info:

1. So, apparently, to restore the BTRFS snapshot of a root subvolume, I shouldn't do it with the root partition being actively used.

2. So, I need to boot into the desired snapshot from the boot manager itself.

3. GRUB has grub-btrfs, which lets you boot into snapshot from OS selection screen itself.

4. rEFInd has refind-btrfs, which should do the same as grub-btrfs. But it didn't in my case. I am not seeing any way to boot into a snapshot from rEFInd.

5. I use BTRFS Assistant with snapper to manage snapshots.

6. I am not seeing any way to restore the snapshot from live environment too.

7. I am using CachyOS (Arch) with Plasma DE.

8. I suspect the reason is my unusual /efi /boot partition layout. (attached below)

9. I did my partition this way because, my initial EFI partition had less storage (as seen on image), so , I created another boot partition and mounted my pre-existing EFI partition to /boot/efi. I did this by referring a Youtube video (I know, I should've known better)

10. I also encrypted my BTRFS / partition

11. If you need any other info, please ask.