https://waveterm.dev has some screenshots. Also checkout our twitter feed https://twitter.com/wavetermdev . I couldn't post the homepage as the main link because of a dup check on HN (someone unaffiliated with the company posted the link last week).
Maybe ask dang via hn@ycombinator.com if he could change the submission URL, as I got more information from the website than the GitHub repo.
If you want to.