Would it be possible to limit the max option width? In base Sodium, it's set to a fixed size like this:

Of course, this isn't optimal for settings with long texts, but using ~95% of my screen width like your mod does also is incredibly weird, especially on wide displays / small UI scaling:

Would it be possible to limit it somewhere around this size?

It's scaling off GUI scale factor. The ideal solution is to have an option to have it always be centered and like using GUI scale of 3.

Edit: Sodium's original menu does the same thing except it's just getting smaller and stays on the top left.

I have the same issue.

Using a 40in 4k monitor