Hello kikofeuntes,
Apple Support Communities is a great place for help with parental controls. From the description, it sounds as though you’ve verified Content & Privacy Restrictions and App Limits have been enabled for those applications as outlined in the following article, but they remain accessible.
Use parental controls on your child’s iPhone, iPad, and iPod touch
To confirm, when going in to Settings > Screen Time > App Limits, and Content & Privacy Restrictions. Are the settings you previously set still shown? For example, the limits you set for those apps, do they still appear as they previously were or do they show as having been reset or returned to the default setting?
Also, if you haven't restarted your iPhone and/or verified you're running the latest iOS, you'll want to try those steps next. Those steps can be found in the articles linked below, and may be helpful in resolving this issue.
Restart your iPhone
Update your iPhone, iPad, or iPod touch
Let us know how that goes!