Power is out in specific areas because Hamas was in control of all civil offices and they're gone. So while the grid is back up, there's no engineers to connect the destroyed relays.
The trucks are back in. The problem is on the other side of the fence https://www.npr.org/2024/04/09/1243752564/hundreds-of-aid-tr...
You can blame that problem on Israel too although this isn't something Israel can fix.
You're using a typical western POV which is severely broken and damaging to the people of Gaza. E.g.
"Hamas Leader Reacts to 3 Sons Being Killed: 'Thank God'" https://www.newsweek.com/hamas-leader-reacts-3-sons-killed-t...
There's a picture of him smiling as he brings the news to his wife where you also see her smiling. I can't imagine losing a child, just thinking about him losing a child makes me tear up. It's unimaginable. Yet Hamas leaders consider the death and suffering of their own children in the Jihad as a blessing.
That is fanatic religious insanity. But they understand that the West doesn't see it that way. So they use Palestinian children in the most heinous ways possible, as couriers between their tunnels and bait. An accidental death of a child is propaganda and they live on that. Recently they published a video of an Israeli army dog attacking an old woman. They literally kidnapped that dog and used it to stage an attack for propaganda.
I'm not saying that horrible things aren't happening there due to Israeli actions. On the contrary, they are. But they are happening there for the most part because Hamas is an enemy of the Palestinian people as much as it is an enemy of Israel. It is using Hospitals, Schools and Mosques as bases. They placed a huge weapons cache under a refuge sanction, then when it exploded it was easy to blame Israel and for 24-48 hours the media reported that it was Israel.
Western ignorant good intentions are prolonging the war and making it worse because they're giving Hamas false hope.