See the React docs on how to render multiple components: https://reactjs.org/docs/lists-and-keys.html#rendering-multiple-components
The return statement exits the function, you're trying to aggregate that list of results into a list of articles. So you shouldn't use the for loop, you need to structure your code to work in a functional pattern. Also, React expects that you return a single component.
So your code should look something like this:
const FinAidView = (props) => {
return <div>
{props.content.items.map(item => (<article><h1>{item.title}</h1></article>))}
</div>
}