If you stick it on with contact glue it would be tacky at first.
So long you don't cut holes in it and it's removable you can always try it out to see how you like it. Might stuff up your aerodynamics a bit, and if you did make a hole, which is pointless to do, you will cause some water ingress problems in boat mode etc.
Just my personal opinion, but really? All the trappings of regular-ass ICE burners? C'mon, Cybertruck is way too badass, sleek and futuristic to wear any of that stuff. It is funny to think about, but no way am I filling up my CT with fufu-berry shit. We have to be better than this.