This question is especially for people who have joined in the last week. Have you used other fediverse platforms or is this your first time really using one? What do you think of it so far? Are you aware that you can comment on Lemmy posts with a Mastodon account?
https://github.com/LemmyNet I don’t know about any changelog posts but I think everything you need yoh can find in the code repositories. Check out the issues tab on repos to find bug reports and feature requests