Those dates are wrong. I have seen 4 chaperts and there is 2 more.
If you're curious, there's a robust discussion I've participated in on the matter over at TMDB, where the episode airdate metadata comes from: https://www.themoviedb.org/tv/68507-his-dark-materials/discuss/638a74681283e90083222764?language=en-US
Shout by jacintoooBlockedParent2022-12-19T17:04:36Z
Those dates are wrong. I have seen 4 chaperts and there is 2 more.