No, siege is when you are suffering from a famine because a government that hasn't received a vote in 15 years picked a fight with a heavily armed neighbor, and said neighbor collectively punishes all of your people for their mistakes (which is a war crime, btw).
You are misinformed. The food trucks are not from Israel. They are being blockaded by Israel and the food destroyed. There's ample evidence for this. They film themselves doing it.
You say you've "been there". I assume you mean Israel and not Gaza. Maybe, if you're so confident that Israel are the good guys here, you should go back and help get those aid trucks through the Israeli blockades. Maybe you should try to stop the soldiers from gunning down people trying to collect flour from the few trucks that do get through.
You might be thinking something outlandish like: "It must be Hamas. Some sort of deep-cover thing where they're killing their own people to implicate the Most Moral Army In The World", and honestly, if you're that far gone, there's no helping you. I'm not going to sit here though and let you repeat lies unchallenged. Israel has -- in the words of its own ministers, besieged Gaza. It's so bad that even Biden has demanded that they let aid trucks through.
You are misinformed. I encourage you to learn more about the country you're defending.