Displaying GF post creation custom field with Elementor

This is driving my crazy! We us GF to publish user-submitted articles. It’s great for feeding in the title, featured image and content, but I want a headshot and bio at the bottom. I created the custom fields (text and file upload), but how do I get them to display on the page? I’m using Elementor Pro and Theme Builder. Elementor doesn’t offer any “custom field” widget and the merge tags don’t do anything.