Do Customizer settings (besides colors) generate CSS variables?

Use case:
Let's say I set an option in the Customizer, like Typography > All Headings, and I set a font family and font-size. Now I want all the headings of a 3rd party forms plugin to inherit those settings.

Have my Customizer settings generated variables in GP that I can reference elsewhere in my own additional CSS to accomplish this?

I'd love to be able to declare something like:

.forms-plugin-headings-selector {
  font-family: var(--gp--all-headings--font-family);
  font-size: var(--gp--all-headings--font-size);
}

Currently, I add some base :root declarations like --default-border-radius and --default-body-font-size into Additional CSS, but so many downstream changes could be streamlined if I could make them automatically inherit settings from what I've done in the Customizer.

If this is not currently a thing, how do we request it as a feature? :D