Calling it a code editor is like calling my car a “work transport vehicle”
Vim is an all purpose text-editing machine and although it has some definite quirks it solves problems. If you’ve used original vi you’ll know just how much more amazing vim is without changing the core concepts.
Much love to Bram, you made the world a better place ❤️
Did you expand the filesystem itself?
You go from physical (your dd) to encrypted (luks) to lvm(if used) to your filesytem itself.
You probably have btrfs so check out Resizing btrfs
Edit: I can read, you have ext4 :)
Check out resize2fs, IIRC it can do it live on a mounted partition