ViewModel

val wordPressPostList: List<WordPressPostDataDomain>
    field = mutableListOf<WordPressPostDataDomain>()

// States goes here...
is RequestStatus.Success -> {
   if (it.data.postList.isNotEmpty()) {
       wordPressPostList.addAll(it.data.postList)
   ｝
   _wordPressPostsState.send(WordPressPostsState.FetchSuccess(wordPressPostList.toList()))
}

Fragment

newsAdapter.submitList(state.postList)

ListAdapter won’t work without calling .toList() either state.postList or when passing it to state WordPressPostsState.FetchSuccess in ViewModel