Pass additional props to functional component

I have a constellation like this:

<AComponent>
  foo={{bar: AFunctionalComponent}}
</AComponent>

export default function AFunctionalComponent({
  // These are props that will get passed "automatically" by 'AComponent'
  foo, 
  bar, 
  baz
}) 
{...}

Now I want to pass an additional prop to AFunctionalComponent. How do I do that?