I've thought about buying a replacement and trying to do it myself, I might still do at some point. Not like I can break the touch screen any more than it already is lol.
I'm not sure about rodents. I keep the car in the garage at all times and have never seen any sign of rodents at our house, but it could be possible.
I don't know Bolt touchscreen specifics, but a lot of electronics in newer cars are paired to the id in the cars BCM or security module and installing replacement parts requires activation/re-registering using proprietary dealership tools.
I'm not sure about rodents. I keep the car in the garage at all times and have never seen any sign of rodents at our house, but it could be possible.