Yes. - Web browser, both Safari and embedded app browsers honour these settings - You can disable apps that do not have parental controls integrated I do not

Yes. - Web browser, both Safari and embedded app browsers honour these settings - You can disable apps that do not have parental controls integrated I do not know if there are generally available whitelists for websites, and I assume this would depend on the cultural context like the nationality and religion of the parents. Please correct me if I am wrong.