Is there a Fortnite Shop ban?

Absolutely need them

I don't quite understand what you mean by a shop lock.

There's a so-called child safety feature, which can prevent the following if it is set this way:

Purchases

Communication with other players

Playtime

Adding friends

Access to multiplayer modes

Broadcasting / streaming gameplay

Which games can be played and downloaded

What content can be seen and shared

What information can be seen by other players

Access to surf the Internet

Using VR

You can find the source and further information here: https://www.epicgames.com/...l-controls

Beautiful evening!