“”How can you miss that?””
Gee - with all the commotion, I have no idea! The word “stroller” was heard and other than the two guys yelling at one another, nothing else was clear...
I wonder why the article at the link referred to “twins”...It doesn’t appear that she had twin babies with her. If it was a stroller for TWO, it probably would not have fit in the overhead. The article does say she was told she could look for another place to stow it by a flight attendant.