https://www.sunflexzone.com/products/2x-stealth-anti-tracking-ir-infrared-license-plate-blocker-privacy-frame-anti-alpr
This should be legal because it doesn't conceal anything.
It only adds extra IR light to subtly enhance the beautiful colors of the plate(which also happens to blind cameras).
But of course there is a blanket statute for everything possible under the sun..
Downside is you don't know if it's working, needs juice to work, and IR bulbs will wear out after less than a year even though they still "look" the same.