For the people who are wondering why there Ulrich and Charlotte wasn't there in the origin world was because they were never born, clearly. When Hannah goes back in time (in Adam's world) she gets pregnant with Silja, who give birth to Hanno and Agnes.
Hanno who later becomes Noah, who travels to the future to help create the portal again, with Elisabeth. They give birth to Charlotte, who is kidnapped by the future Elisabeth and Charlotte and given to HG Tannhaus. And the loop goes on and on. Agnes is the mother of Tornte, who left him with the Tiedemann's. And later he becomes the father to Mads (who gets lost in 1956 and is found in the woods in 2019, when Mikkel gets lost) and Ulrich.
Hanno (Noah) and Agnes being the kids of Silja, who never get born in the origin world. Hannah never travels back in time and meet Egon and gets pregnant with Silja. They never travels back to meet Jonas, again, who murders Hannah and send Silja to the future for her to come back in time and meet Bartoze, who then give birth to Agnes and Hanno (Noah). So, they never existed and we don't get to see either Ulrich and Charlotte in the origin world where Hannah, Regina, Katharina, Wöller, Peter and Benni are having dinner together. And since Ulrich and Charlotte never existed, so didn't their kids: Martha, Magnus, Mikkel, Elisabeth, Franziska and even Jonas.
