Well, so far looks quite basic to me tbh. What I always look for as musts in every app is version control (git integration ideally) and option to extract everything in some common format. It's 2022 and I am too paranoid already that service will turn to paid one when you least expect it.
Also make sure that its possible to add pictures, videos in text and WISWYIG editor would be helpful. We chose docs tool 2 weeks ago and went for bookstack.