No, Stephens and Propper could and should contribute more. And personally, I would move on from Stephens this summer.
However, goals and assists are not the reason they are selected and should not be judged on them.
FYI, as you can see below, that's a lot of passes that aren't sideways.
If people think Propper is shit because he hasn't got many goals or assists, just wait until they see how many goals and assists Bissouma has this year.