TBF, nobody has freaking arc in this film.
Poe’s arc… from hothead flyboy to responsible general.
Finn’s arc… from victim of the empire and all alone, to force sensitive leader who teams up with other victims to topple it.
Rey’s arc… from someone who is lost, drawn to darkness, and doesn’t know her place or have a family to someone who chooses good, has a family, and presumably becomes the leader of a new Jedi Order.
If that’s not an arc… I don’t know what an arc is then.
Maybe it’s just not the arc you would have written.