Why are shelters not reaching Gaza despite being part of the ceasefire agreement?

Israel is reportedly blocking the entry of shelters into Gaza, despite this being a condition of the ceasefire agreement. Under the agreement, Israel had committed to allowing 60,000 mobile homes and 10,000 tents into Gaza, but only 20,000 tents have been permitted entry while none of the mobile homes have gained access. The tens of thousands of mobile homes remain stranded at the Rafah crossing with Egypt, awaiting Israeli permission to enter. This blockage comes as Israel continues its military operations in Gaza, violating key humanitarian provisions of the ceasefire deal that was meant to provide essential shelter for displaced Palestinians.