I didn't really think much about it, which I think is a good thing. I recall that in Humankind, you had a type of simultaneous turns as well, but you also had units which could start moving when you approached them, effectively adding a twitch reflex element to a narratively focused turn based strategy game. Ara fortunately doesn't do anything like this that I am aware of. You do your things, put in your moves, and end your turn. Whatever needs to be resolved will be resolved, and then it's the next turn.
To be honest, I do like sequential turns for the directness of action, but there are clear advantages to simultaneous turns as well. Considering the scale of Ara, simultaneous turns is a natural choice. I can't imagine a 36 player game with sequential turns.