Like Invictus Games and United for Wildlife, Together (the cookbook) is listed on the Royal Foundation's website under "projects". I do expect it to grow and expand much like the Invictus Games which actually was planned at first as a one shot event.
Sure, the government has responded to the Grenfell Towers tragedy with financial help to rebuild but its the community itself that recognized that there was a need to band together, support each other and in finding each other and feeding each other and consoling each other, they found a purpose that gave life meaning. Its snowballed into something much bigger as time passed and with the help of Meghan and the cookbook, its provided the means. Its an example for other communities to follow.
Meghan and Harry and Adele give the Hubb Kitchen the moral support and publicity boost it needs but the actual day to day work that's done that has made the Hubb Kitchen the success it is, is due solely to the people that work tirelessly to make it what it is. They've created their own miracle and deserve the recognition.