Is there a way I can make this Wizard Step layout more fluid?

I am building a wizard within an action using steps and one of the sections currently looks as pictured. My question is: Is there a good way to have a fluid layout with a repeater? Due to the other step sizes, the modal width is quite large, so I would like to have each supplementary item in one of two columns, left, right, left, right and so on. If there is a link to some docs I am missing I apologise.