Only MK & Epcot have consistent (usually) one day a week PM EMHs. MK is usually Wed PM and Epcot is usually Tuesday PM, but they can sometimes tinker with the rotation so don't rely on that statement as fact for your dates.
They have done "a few" at DHS since TSL opened this summer, but so far it has been pretty rare (which gets a thumbs down from me since I think TSL at night is a great experience).
We haven't seen any PM EMHs at AK since a run late May-Aug 2017 around when Pandora opened.
So yeah, unfortunately, you don't often have much to choose from for PM EMHs given current scheduling trends. Although caveat, always check and re-check the calendar for your dates in case Disney tweaks things.