Prior to Gutenberg, I could arrange my images together and assign them any width I wanted, to organize the site better. What I’m talking about is this option: https://heythemers.com/documentation/calafate/assets/img/steps/011.jpg
Which I now can’t find, is it gone? I was trying to make two images on my site go together, but one is always bigger than the other, with column width this used to be an easy fix.
I haven’t a clue what UI that was using by looking at the image. More then likely it is some other plugin that provided it, or perhaps something that was built into your theme, but it is not something that ACF does.