since nobody actually has an explanation yet I'll give my extremely unqualified one (aka, I was sent a tiktok like 2 weeks ago)
Basically they saw big T-rexes and little ones. They assumed the little ones were babies, but now new evidence has shown that they might not be related and they're just a similar looking dinosower
no idea what the third version is, the tiktok didn't go over that one π€·ββοΈ
I'll let someone else with more experience correct me lol


