In a statement on February 21, Hamas said it would “conduct a thorough review” of the information regarding the body. It suggested a possible mix-up of remains might have occurred due to Israeli bombing of the area where the Israeli hostages were being held because other Palestinians were also present.

Source: https://www.france24.com/en/video/20250221-hamas-official-says-likely-body-of-shiri-bibas-mistakenly-mixed-with-others-in-gaza-rubble