Government information, both current and archived data, needs to be accessible. Access to old information can be important because of historical facts or cultural aspects. Or companies and citizens can use information from governmental websites. For instance, they can use information from a government website as proof in a lawsuit.
If you want to see what appeared on dutchncca.nl in the past, see the online archive of the Dutch NCCA. Select a date from the calendar. You will then see the website as it appeared on that date. You can go back as far as the 31st of January 2023.