If it's got a bse kit, it still has a chain under that cover, a short one to drive the oil pump. You might be able to feel the tension side of the chain, above and parallel to the slack side that's under the inspection plate.

You might also pull the bs bore cover on the dside and see that balance shaft. but sometimes the lazy leave the dside shaft in so they don't have to drive in the blank bearing to block off the oil passage on that side. You might get enough sight line by looking down the timing chain hole in the head, especially if you use a borescope. That way all you have to do is pull the valve cover.