Yes and no.
The default ScrollWidth, set in scintillas Editor.cxx:146 is 2000 (I guess pixels, but I am not sure about that).
But it's intended, that we do not change it, because almost every text fits into it.
Making it configurable can be an option, but should be discussed, but I did not find an option to use a character count as ScrollWidth, just the pixels (or whatever it is).
Because of users having very long lines I added the "Automatically determine ..." stuff.