My truck is a 2025 Big Horn, has the technology package. I do get the zzt-zzt at random times. I normally park in the garage, leave the key in the truck. Never had a dead battery in 11 months and 15000 miles, so I don't think leaving the key in the truck causes dead batteries. It will typically make the noise when I open the door. If I am out someplace, and hit the unlock button, it will make the noise.
A couple of days ago, the truck was in the driveway, locked, and I had the key in my pocket. I walked near it, and got a couple of zzt-zzts from it. I have to think it was detecting the key, because it did not do it if I walked by without the key in my pocket.
Still don't know what it is, but it isn't loud, and not really annoying, at least to me. I am sure it is some normal function, just don't know what it is.