I ran a quick search for design patents assigned to Toyota and didn't see anything for this version of the TRD wheels. Design patent applications aren't public until they're issued, so there is a possibility they have an application pending that could later issue. But I'd say this is unlikely because it looks like these wheels were released several years ago, about 50% of design applications issue within 12 months, and about 99% of design applications issue within 36 months.
So, about releasing those wheels...
That may be THE reason why FN Wheels just knowingly and openly rip TRD's design!