Many areas of myanmar often only has power for a few hours at a time but the little infrastructure they have has been disrupted so even developed areas or areas that were outside of the earthquake's center have no power again. The wealthy have solar power and sustain. Major roads have also gone astray, cutting off some people's access to food.
Just a reminder that when you see news about earthquakes like this, it's a literal collapse of people's lives, and there is still a wealth (often in relation to ethno-religious classes) disparity in who survives.
In a country where many people are impoverished and unable to eat, even more so are they now isolated and many of the injured will likely never be found.