https://screenrant.com/big-bang-theory-young-sheldon-missy-hair-spoiled/

Young Sheldon season 6 features a Missy disaster that is still waiting to be resolved, but The Big Bang Theory has already spoiled what happens to it.

You link way too many of these dumb things to that site that try to link all scripts to canon of BBT. IT DOESN'T MATTER. IT'S ALL A MONEY GRAB. Lorre doesn't even care if it makes sense or not or if it fits the story from the program of a show that's been off the air for over three years now. He's gonna ride this show until the ratings die, even if the kids turn 30 on it.

Don't worry if the story doesn't match up and don't feel the need to link so many articles to that site that goes nuts if the story line isn't consistent. It really makes no difference. I can totally see them ending this show without even covering George's death. They can run it up to it and go to black and that could be the ending. Again, it really doesn't matter as far as having a consistent story. Getting paid matters a lot more.