Finding a quiz Additional Comments endpoint from the Canvas API

[Rudyy]

I need to access the additional comments an instructor can leave on quiz questions through the canvas API. There is no "additional comments" section on quiz questions, quiz submissions, or submissions. I did check "submission_comments" on submissions that are quizzes that have additional comments, but that field contains only an empty list, so it does not get filled by additional comments.

It appears that canvas may not have an endpoint for these comments? If anyone knows the endpoint or if it exists, I would be very grateful for that information.