Can a green card holder travel to Iran and come back to the US right now?

My wife is a green card holder and she wants to travel to Iran in the next month for a couple of weeks. Is she exempt from current 14 days quarantine rule before entering the US? We have a friend, who is also a green card holder, that traveled to Iran about two months ago and came back to the US without any problem, but at that time Trump was president so I’m not sure if still the same rules are in effect or not.