You'd think the number of episodes would be on Netflix's promo page for the series, but it's not. The only clue is that there are only a handful of trailers for episodes there.
But streaming upends the notions of miniseries vs regular series because the old rules no longer apply. They could release one chunk of episodes and then another chunk later on, with the same characters and premise, or altered significantly, like a spinoff series. One of the neat things about streaming is that it creates an opportunity to change all the rules about TV (and movie) formats. They will have a much freer hand to do whatever makes sense for the story.