I was confused by this yesterday. Seems like the New York Post claims she was beheaded, citing Isaac Herzog as a source, but after reading it on more outlets seems that they found a skull fragment at the festival area, so not in Gaza. And no they did not find her skull. In fact it seems that her body at least made it to Gaza and her mother had received footage that places her in a Gaza hospital.
Not sure who would benefit from ruining this girl’s memory with propaganda… Oh wait.