This is a good question - and to be clear, it's not just about people whose houses were burned down. At the moment around 125,000 Israelis are displaced from their homes, both in the Gaza border towns and the northern border, and cannot return because those areas are still being shelled by Hamas (in the south) and Hezbollah (in the north) - and of course some of those people have no homes to return to, on the Gaza border obviously, but also in the north by the Lebanese border, where loss of life has been much less as people were evacuated, but there has been very serious damage to property in many places near the border - the news even reported that over half of the buildings on one of the kibbutzim on the Lebanese border have been destroyed.
Yes, they have received government support, but yes also day-to-day efforts helping them have been led by the community. Hotels across the country are still full of displaced people. There is one near where I live and in the days after Oct 7 multiple messages would come on community whatsapps every day asking people to donate specific things that were needed (to the level of "the women here dress conservatively, please can people bring long skirts"). Our local community centre turned into a donation centre, and more centrally, volunteers in Tel Aviv filled the convention centre with donations and got them to where they were needed.
In the first days everything was very chaotic and a lot of people ended up crashing at the homes of family and friends until hotel places were arranged. There were websites where you could offer spare rooms, and many people took in strangers, also estate agents convinced owners of empty homes and holiday lets to allow displaced people to stay in them, then co-ordinated that people in the community would bring them food. At this stage, people are making longer term decisions, for example renting apartments outside the border area. The kibbutzim, which are communal villages, make decisions as a group, so for example one kibbutz is being hosted by a different kibbutz in the north and has decided to stay for a year, Kibbutz Sa'ad are staying in their hotel at the Dead Sea and Kibbutz Re'im are taking over an empty apartment building in Tel Aviv. Obviously though it's complicated: many people are unable to work as they are far from their workplace. Kids are gradually being integrated into local schools. There is financial and psychological support but also very great needs.
On the latter, I have encouraged people in the past on this forum that if they want to make a difference, charitable donation to organizations addressing the many needs in Gaza and Israel are one way to help. If the Israeli communities particularly affected by 7.10 are people you would like to help, I wanted to share a really nice initiative here in Israel where students and faculty at Bezalel, Israel's top art school, produced pictures illustrating views around those communities. You can buy a digital copy of any picture for 100 shekels (£22/$28), you download it and print it yourself, and the entire donation goes to the Shoresh Fund who are dealing with the direct needs of those evacuated from those Israeli communities. I know that needs are very great in the region, but I think this is a very unique initiative as it also helps to see those places as thriving communities, not as sites of destruction. (I'm not in any way connected with this initiative, I just like it and have bought a couple of pictures myself, as have several friends)
https://wrappingmemory.bezalel.ac.il/en