I think this is driven by both culture and the grade of economic development of the country you live in. In my home country of Italy, it would be considered kinda crazy to charge your kids rent. There are very practical reasons behind it: high youth unemployment, low salaries when you're just starting your career. Rental apartments are also really expensive in big cities and you just can't afford one without getting a roommate (or a partner with a job). So people end up staying at home longer to save money for a down payment, and the parents are totally fine with it.

I live in the US now, and here, where it is (used to be?) easy to land a well-paying job fresh out of school, it is considered quite common to charge your children rent if they decide to stay at home. My feeling is that staying at home in the USA carries quite some stigma for both the kid and their parents. American culture puts a lot of value in self-reliance and financial independence, and the general idea is that you failed as a parent if your kids aren't able to afford their own place.

(I also have a feeling all of the above is changing dramatically, given the current cost of living crisis in America.)