So i've both made missions with JTAC as well as edited the A-10 mission "shooting range" and can't get a JTAC option to show up in the radio menu. Also even though i'm tuned to the flight UHF channel I can't hear other flight as you can in the hog. I tested the edited mission(s) with the A-10 and have no problems hearing and communicating with JTAC.
I've also tried different radios (uhf,am,fm) and still nothing. Would be a useful option if it's not implemented, IR pointer for nighttime, smoke marker for day.