Some non-accredited programs (or I guess 1 program in texas I think), gave dedicated OR time for fellows, and when I interviewed, the fellows stated they were able to participate. Not sure if that meant they held the retractor, or actually made an incision and inserted the scope in supervision of the ortho surgeon.
In general, plain arthroscopes are seldom down now **by good surgeons**, generally there is an intervention of some sort (i.e. dissection, removal of body, suture repair, repair of an OCD lesion etc.), and thus a PCSM doing a scope really is useless.