onActivityCreated_.kt

 override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)

        rv_room.setHasFixedSize(true)
        rv_room.layoutManager = LinearLayoutManager(context)

        launch {
            context?.let {
                val palestrantes = PalestranteDB.getDatabase(it).dao().buscarTodos()
                rv_room.adapter =  PalestranteAdapter(palestrantes)
            }
        }
    }