What is the issue when navigating from a child fragment to a bottom navigation fragment?

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The issue when navigating from a child fragment to a bottom navigation fragment is that the child fragment may not have access to the bottom navigation view, and therefore cannot directly perform the navigation action. To overcome this issue, you can use callbacks or interfaces to communicate between the child fragment and the parent fragment, which has access to the bottom navigation view. The parent fragment can then perform the navigation action on behalf of the child fragment.