https://screenrant.com/young-sheldon-6-missy-penny-big-bang-theory-frienship-explained/

The Big Bang Theory depicted Missy making friends with one of Sheldon's acquaintances, and one Young Sheldon season 6 plot justified this alliance.

Young Sheldon Season 6's Best Story Is Happening Offscreen (https://screenrant.com/young-sheldon-season-6-best-story-missy-offscreen/)

Young Sheldon season 6 has done a great job moving Sheldon and the rest of the Coopers' story forward, but its best narrative is happening offscreen.