Hamas had to have known that Israel would attempt to identify the bodies once they were handed over, so that makes me think of three possible ways this could have gone:

1. Hamas does not have and/or does not know where the body of Shiri Bibas is, and was hoping Israel wouldn’t check.

2. Hamas “accidentally” handed over the wrong coffin, or wrongly labeled the coffin of another hostage as Shiri Bibas.

3. Or lastly, the body of Shiri Bibas is in such a state that Hamas does not want Israel to have access to it, with them likely having disposed of or hid her actual body.

None of these reason are acceptable in the slightest and Hamas must answer for where the body of Shiri Bibas actually is, or else this is a major violation of the ongoing ceasefire and Israel would justified in resuming offensive operations.