Sim free iPhone

Yes, you should be able to.

Do note, that the warranty will not be valid in Jordan, so you will need to take the phone back to the US for warranty service. Apple does not accept international shipments for service and repair.

Yes, sim free iPhones are unlocked and work with most GSM carriers around the world.

The only limitation to this is the 5G networks. The US uses different bands for the higher speed version, so you may not get full 5G in certain locations even if its available, but you will get 100% functional 4G/LTE and 3G where available.

Keep in mind if you are buying from Apple they will not ship internationally or to shipping forwarders you will have to come to the US to purchase it and you will have to return to the US for warranty service.