Hi mojo1977,
Thanks for your post and welcome to the forums. It's great having you on board with us in the Community. ⭐
We're sorry to hear you're having trouble accessing the parental controls via the app. If they are not available then this suggests you may not be using the Primary Account details and instead logging in as a sub user.
To test this, can you try viewing your bills to see if these are displayed and update us to let us know what you're seeing?
If you are able to view the bills then please try navigating to Virgin Media > Account Settings > Essential Security. This should then load the parental control options. You can view more on what Essential Security is here.
Keep us posted on how things go.
Thanks,