Not sure why I haven't noticed this before - I guess I hadn't looked for it or seen the need just yet. But you can add custom pagers to LazyGit so you can see a better git diff view than what it normally gives you.

In your configuration file (can we opened by pressing e in the status panel in LazyGit), you can define:

git:
  pagers:
    - pager: delta --dark --paging=never
    - pager: ydiff -p cat -s --wrap --width={{columnWidth}}
      colorArg: never
    - externalDiffCommand: difft --color=always

Defining multiple, makes it so you can cycle through them using | - which is great!

I only have one defined, which is pager: delta --dark --paging=never (read more about delta here)