我想把观察到的LiveData放在一个列表中，而你把那个列表放在代码的其他地方。就像这样：

var listCategory = listOf<Category>()

        categoryViewModel.categories.observe(viewLifecycleOwner) {
            listCategory = it
        }
        
        //do something with listCategory

CategoryViewModel.kt

@HiltViewModel
class CategoryViewModel @Inject constructor(private val categoryDao: CategoryDao) :ViewModel() {
    private val categoryFlow = categoryDao.getCategoryFlow()
    val categories = categoryFlow.asLiveData()

    fun addCategory(name:String){
        viewModelScope.launch {
            categoryDao.insert(Category(name = name))
        }
    }
}

CategoryDao.kt

@Dao
interface CategoryDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insert(category: Category)

    @Update
    suspend fun update(category: Category)

    @Delete
    suspend fun delete(category: Category)

    @Query("SELECT * FROM category_table")
    fun getCategoryFlow(): Flow<List<Category>>
}

但是listCategory总是空的，我如何使用观察块之外的观察数据呢？