you often wont find a torque spec for pedals because they tighten themselves as you pedal, that’s why one of them is backwards,
I’ve seen numbers from 30-40 nm for pedals, but there’s really no point. just crank it tightly with a wrench that has more than a few inches of leverage and you’ll be fine. however, they can be VERY hard to remove if not greased properly on install. ask me how I know