This is definitely a temporary install to pass a vehicle inspection. Tires aren't allowed to extend past the fenders, so the kiddie pool fenders get them past that rule.
Lifted trucks here with super wide tire will either have a second set of stock tires/rims that they will install before they go and get a safety check, or they attach cheapo "fenders" that get pulled off immediately after the check.
I haven't ever seen kiddie pool fenders before, I usually see plastic landscape edging instead.