The problem with ozone generators in cars is that they often react with some plastics and do more harm than good. Unfortunately they are the only way of getting in the nooks and crannies and inside the ac vents to clean mold and that kind of stuff.
I’ve had steering wheels turn to gel using ozone and they smell funkier than what was in there.
I also know that one trick to remove the smoke smell from a used car is to use an ozone generator in the car.