Currently when you submit answers during a mock interview, they are saved in your interview history, which is great for referencing back. I would love my submissions during mock interviews to count towards problems progress. For example, if before I start the mock inteview I haven't done problem #x, if during the mock inteview I complete problem #x, it would be very nice to have problem #x marked as completed when browsing problems, and have my solution I submitted during the mock interview come up when I preview problem #x.