I don’t believe it. This sounds like political propaganda. It’s what these agencies do, find issues to complain about. If there were no problems they wouldn’t exist so they always find problems or just make them up. There are numerous pita bread factories running including one in the north that makes 650,000 loafs a day, plus two more in central Gaza. It’s not that far a drive.
If Hamas is still stealing food and other aid, blame it on them.
If is kind of crazy that Gaza starts a war against the country that imports all their food, water, electricity, gas, medical supplies, telecommunications etc and then complains about disruptions in service caused by the war.
Kind of like the Colombia protestors complaining they need to be brought food and water.