The Hilux isn't "banned" from the USA. Toyota can federalize it and sell it here at any time. Toyota doesn't bring it here because we have the Tacoma - a truck designed to be more inline with American consumer tastes.

If Toyota wanted to, they could readily start manufacturing Hiluxes in Mexico and importing them into the USA. Presumably, the reason they don't do this is because Americans hate small pickup trucks. Every single truck on sale in the USDM sells better in larger footprint spec.

There's maybe 20k American who are willing to buy a new truck with the wheelbase the size of a Mustang (smallest Hilux). Even small BoF SUVs have the same problem. Take the FJ Cruiser, despite being a cult classic, it sold terribly in the USA, likely due to being too small.

Plus, they are expensive. In Australia, the cheapest non-work-spec Hilux trim is ~$55k - which is like $38kUSD. A Tacoma starts cheaper than that and is much larger.