There does not seem to be a way to control the amount of margin or padding that you add to the paragraph that wraps each field and it’s label.

You are setting the bottom margin for the paragraphs to be 2em, but there is already bottom padding for paragraphs set to 1em. I believe this is set by Divi, and maybe it changed in a recent update, or maybe I set this somewhere else. The padding comes from Divi’s stylesheet, style.dev.css, line 104.

Either way, I ended up with 3em of space below each field. If we had a way to control the margin and padding for the paragraphs here, that should solve the problem.

I see related support posts, but your previous recommendation of your Divi AiO plugin seems to be too old to be relevant, since the plugin is no longer available, and the other person never responded with more details.

https://wordpress.org/support/topic/spacing-between-form-fields/
https://wordpress.org/support/topic/feature-request-spacing-between-form-fields/

For now I’ll fix this with custom css outside of the Divi Builder, but it would be nice to have settings to control the margin and padding here and not be forced to 2em.