visionOS world anchors maximum area of effect?

Hello, I have an app that is using WorldAnchorProvider, basically soemthing similar to the obeject placement example. I'd like to show to the user a specific UI when no anchors where loaded. However, no matter where I move withing my house, they always load. So I was wondering, how far do I need to go in order to for the device not be able to load my placed world anchors?

Thanks