I got 2 spare keys cut today at Lowes here in Edomnton today for 3 bucks each. It is all you need in your wallet or a mag case or pocket to get into the truck. Way less size than a second fob.
The 2020 and 2021 cannot be locked with the fob in the truck by hitting the door lock on the arm or the outside button, if u try the horn will sound three times and the door will unlock the first two times u try it, it will lock the third time, but you CAN LOCK it if you push down the lock tab or hit it with your elbow getting out. If the other 3 doors are locked u have a problem.