What did people on the Temple Mount do during the Yom Kippur Avodah?

Maybe this is dumb question, but in the Avodah, the Kohen Gadol is doing almost everything and the Mishnah says one of the miracles of the Beit Hamikdash was that there was barely any room to stand, but everyone had full room to prostrate. In general yes I know people were watching the Kohen do everything, they would listen to the Kohen Gadol’s Kriat HaTorah, and at times would respond to the Kohen’s utterance of HaShem’s true name. Aside from that, did people watching DO anything besides watching? There were no books so I can’t imagine any organized prayer, maybe personal prayers? Would appreciate any responses!