With all due respect, everyone dies! So this is not a rare phenomenon, but yes, a minute's silence, etc. is in order. But kings and queens are not the glue of a society. Long since they have fought at the forefront, and sacrificed themselves for the people. The glue in society is the everyday things, such as e.g. kicking a ball, watching football with others, etc.
But yes, it is historic, and it will go down in the history books. However, the flood in Pakistan and a number of other climate-related things, the war in Ukraine, and the economic recession are also historical phenomena, some would say far more significant, but we do not cancel life to sit down to mourn for 10 days.
The Queen has probably lived a very good life, and is probably among the top 1 percent in world history. She has also exceeded the average lifespan - by a good margin. All this because she has been lucky with her genes, and born into the right family. She has done nothing to qualify for this life, or achieve it through competition. But my condolences and I hope you get through these difficult times. Meanwhile, children die every five seconds in the world, and approximately 80 million are fleeing war and persecution, ++ ++ but of course this is a unique historical phenomenon.