gehenna:

 

… but I have to go update my UDM. 

 

This is especially advisable for them, but not only for them. 😉

If the sole mission is to perform parental controls then I’d suggest either of the following depending on your devices..

• it allows anywhere / anytime adjustments
• you are not tied to having to log into a single physical router to make changes 

google family link - for android devices 

Apple screentime app - for Apple devices

microsoft have a similar app for PCs