We knew that the real Jalal was very busy with wars and national's affairs. So, it is not a surprise if he don't have so much time at Harem and don't have many child although he had a Harem full with women.
But as EK never shows us any war scene, it is safe to assume that EK's Jalal spend a lot time at his Harem to solve Agra's kitchen affairsđ. It does make me wonder why EK's Jalal is still childless because with that amount of women and time he's spend at his Harem, his can be a father to a dozen newborns per dayđ.
Don't you think so too?