You need to meet the same requirements as anyone getting an initial ATP in the US: ATP-CTP course as a prerequisite for the knowledge test, pass the knowledge test, and train for and pass a practical test.
You can do this in 2-3 weeks with some planning. It can be done in a light twin. Probably cheaper than in a sim for a type rating. You can do ATP-CTP with Delta, then just drive 20 miles to Accessible Aviation in Hampton, GA, as an example.
If you truly have some benefit from doing it in a sim for a type rating in something you already fly, I think there are some options that way. Look for a place that will do ATP-CTP in the same kind of sim you are already in and work with them to get a head start and just roll right into the TR course.
Look up what the visa requirements are for this. And TSA.