The Text displays only one updated line of Live Data. How to make sure that the text is not overwritten, but Live Data lines are added?

            var myLive = MutableLiveData<String>()
            
            setContent {
            val text: String? by myLive.observeAsState()
            text?.let { viewModel.ontextfieldvalChange(it) }

                        SelectionContainer() {
                            Text(
                                gameUiState.textfieldval,
                                modifier = Modifier
                                    .background(Color.Black)
                                    .height(150.dp)
                                    .verticalScroll(scroll)
                                    .border(BorderStroke(1.dp, Color.Gray)),
                                color = Color.Green
                            )
                        }
                      }

            apiWithoutCompose()
                 {myLive.postValue(link.absUrl("href")}