My keyless entry nor my unlock stem button on my driver side will unlock my passenger doors.

It can be a number of issues however the first thing I would start with would be the fuse. See if there are more than one fuse that controls the locks on the car (this fuse map can be found in the owners manual, online, or on the reverse of the fuse panel cover. If the fuse or fuses are intact and function, the electrical switch that locks the door with the drivers door power lock button or the keyless entry fob may be shot. In that case removing the door panel and pulling the switch will be the only way to know. You can pick up a new one online or at a junk yard. Lastly it could be a wiring or electrical issue. Does the car have any other power related issues? Non functional turn signals, lights, power windows? If so, that would be something I would have a reputable mechanic review. Best of luck!

Sounds like the door lock actuator needs to be replaced on that door. They do not look too expensive and if you can get the inside door panel off they do not look that difficult to replace. There are YouTube videos that detail the process.

Most cars have connecting rods from the accuators to the locks, They are held in place by a plastic clip. Sometimes the rods are not completely seated into the clip and over time the rods work there way loose from the lock or accuator, or sometimes if the owner has locked the keys in the car they will call someone to come and open the door with a slim-jim. They will usually use a door other then the drivers to to slip the lock just incase they break off the clip or damage a wire during the process, so that the driver's door which is the most frequently used door on any car, will still operate properly in case something gets knocked off or breaks during the process. So, I would check fuses then check the connectiong rods inside that non functioning door first.