Some cars have sensors which don’t identify the specific tire, but simply indicate that one of the tires is low. A Toyota Corolla is like that. Other vehicles not only identify the specific tire, but also tell you the pressure for each tire. A Chevrolet Trailblazer is like that.
A dealer told me that you can’t replace the battery in the sensor, but I’ll bet you can figure out how to do it if you can figure out how to take the sensor apart. We have a questionable sensor on one of our vehicles; one day, when I get some time on my hands, I may try to check the batteries in the sensors.