Bunch of states have the same as MOT, called “inspection”.

I own a skoolie (used school bus converted to a motorhome) and it's hilarious how much of the community likes to rant about Cali's strict emissions policies being the result of liberal woke culture. No, you dumbfucks, it's because they're sandwiched between prevailing westerly winds and a fucking mountain range. You either restrict vehicle emissions or you live in a cloud of smog.

Here in PA, the roadworthiness inspection is separate from the emissions inspection (although both are usually done at the same time).

If it's generally about emissions, remember to always go to a highway and drive the car in high revs (idk about automats but some of them at least have selectors or "at most first two/three gears") for a few miles. Burns off a bit of excess that would show up when then inspector revs it.

Dad used to do it always and never got flagged for emissions. Other faults may have been there though.

Although this was on diesel idk how much it'd help on gasoline cars