Following a two-week hiatus, CBS releases a new Young Sheldon season 6 clip strongly hinting at when Mandy gives birth to her and Georgie's child. Despite being a fairly new character in The Big Bang Theory spin-off, only introduced in season 5, Mandy has become a member of the Cooper family. After learning about her unexpected pregnancy, she moved in with Meemaw who started taking care of her. Meanwhile, Georgie has remained loyal and devoted to her even though they aren't in a romantic relationship. But they will have to finally figure out their situation soon since their child will soon be born.

https://screenrant.com/young-sheldon-season-6-clip-mandy-birth-timeline/