Looks like Woolworths and Coles are somewhat taking advantage of the current situation. Very few specials.
Woolworths did not release a formal catalogue, because they are unsure of supply, but going by searches of the stuff I buy relatively frequently (and usually has specials), the numbers of things on special has been cut hard.
With Coles, when you do the search, not many things even come back. [ maybe there are specials, but they don't show in the online search because there is no stock ].
But yes, things like Junk Food ( Chips, Lollies, Chocolate, Icecream, etc) are usually on 2 or 3 week special cycles. Very little of it is on special now.