Hi Avimimus,thanks for your questions.😉
The Su-22M4 could carry gunpods on four hardpoints. They were hardpoints 3,4 and 1r and 2r. In Czechoslovakia, they were always carried only at a standard fixed angle and never, and as far as I know, not even at the Su-25 were they shot backwards, always only in the direction of flight. But from what I found in the manual, hardpoints 1r and 2r under fuselage could only be used for shooting backwards.
The SUO-54 armament control system on the Su-22M4 did not allow the use of different types of unguided rockets or anti-surface missiles in one flight. After switching the weapon selector on the stick to the S-60 position, it was possible to use only one type of unguided rockets or one type of guided anti-surface missiles or only SPPU cannon containers.
As for the rockets, it is possible to hang them on up to six suspension points, I am also attaching screenshots from the mission editor for a better idea.
SVKSniper's post in Su-22M4 comming to DCS was marked as the answer