Maybe my knowledge of modern patches and synths is really off but some of those instruments don't sound synthetic.
There is definitely also a real orchestra involved for this series' scoring; it's quite visible in the extended behind the scenes episode on the score for Disney+. Just didn't make it into the music video for some reason.
Yavar
The Disney+ documentaries are all very good but the one on the score is my favorite. Highly recommended, and so nice to see Goransson's enthusiasm.