Can’t GET draft posts via REST API from headless frontend

Ok, so technically I didn’t solve the issue that prevented me from accessing posts in draft status from an external domain where the frontend is hosted using only nonce values. My guess is that the logged_in cookie was not set/could not be read on the frontend side to verify the nonce value during an external AJAX request.

That being said, I installed the JWT Authentication for the WP REST API plugin (https://github.com/Tmeister/wp-api-jwt-auth) and now require admins to login once on the frontend preview page to set the token in local storage.