Get content references inside a content item's Custom JS block

I’ve had this come up in two different places now. I am also trying to create a page which is a blog index (fine) which also includes information for specific selected blog posts. I have created an input for box in which I have a list of references to blog articles. I’m repeating a box within that box based on the values in that list. I’m trying to look up the Title and lead image that are on the Blog Article type, but i only get Type, Id and Model as available to choose from. Do I need to make a separate query for the information for the referenced items? can I dereference them in Custom JS code?