Amazing isn't it? LOLThe internet is a big place. I'm envious of your ability to see every circle, every discussion, everywhere and determine that no Bos were Peeped.
Toy Story 4 was literally made to address Bo Peep's absence (well, maybe not "literally made" for that reason, $$$$ of course ...). She was a main character in the 1st and faded in the 2nd and disappeared in the 3rd. I sometimes think they overdo it with adding new toys but I get why they do it (look, Forky!). Other toys suffer.