>>213641477depends where you are.
In the USA:
Gyros and kebab are made with lamb+beef most of the time because of institutional inertia by big meat packers.
Schwarma is usually made out of straight beef or straight chicken, also due to our meat packing industry.
Al Pastor is usually made with just pork meat. It and kebab are the only two that get the right meat due to our meat packing industrial complex.