I have been testing Windows 10 parental controls and they simply don’t work. Many others have this experience.
They simply do not reliably impose screen time limits and in some cases do not even successfully filter porn. A limitation (not a bug) is that filtering only works with IE and Edge so you must prevent your child installing Firefox or Chrome.
Although it is necessary to set up Microsoft Family and add your children to it I advise that you do not use Parental Controls but invest in an alternative solution.