Like the following, I add multiple elements to the headerList when needed, and refresh, and the headerList will display as many elements as there are.

val pageFlow = Pager(
    config = PagingConfig(
        pageSize = PAGE_SIZE,          
        initialLoadSize = INITIAL_LOAD_SIZE,   
        enablePlaceholders = false,  
        prefetchDistance = PREFETCH_DISTANCE,   
    ),
    initialKey = 1,   
    pagingSourceFactory = { HiPagingSourceFactory() }  
).flow.map { pagingData ->

    headerList.fold(pagingData) { acc, item ->
        acc.insertHeaderItem(TerminalSeparatorType.FULLY_COMPLETE, item)
    }
}.cachedIn(viewModelScope)  

val headerList = mutableListOf<T>()

pagingViewModel.headerList.add(VideoCommentInfo(
    videoId = videoId,
    userName = user?.userName.toString(),
    avatar = user?.avatar.toString(),
    content = comment,
    createdAt = System.currentTimeMillis() / 1000,
    resource = if (filePath == null) null else ResourceInfo(0, filePath),
    type = VideoCommentType.TYPE_ROOT
))
adapter.refresh()

But I didn’t want to call the refresh method, so I cached the pagingdata object and called the following method.

    lifecycleScope.launch {
        pagingViewModel.pageFlow.collect {
            adapter.submitPagingData(it)
        }
    }

    adapter.insertHeaderItem(
        VideoCommentInfo(
            videoId = videoId,
            userName = user?.userName.toString(),
            avatar = user?.avatar.toString(),
            content = comment,
            createdAt = System.currentTimeMillis() / 1000,
            resource = if (filePath == null) null else ResourceInfo(0, filePath),
            type = VideoCommentType.TYPE_ROOT
        )
    )

var pagingData: PagingData<T>? = null

fun insertHeaderItem(item: T) {
    val newPagingData = pagingData?.insertHeaderItem(item = item) ?: return
    submitPagingData(newPagingData)
}

fun submitPagingData(pagingData: PagingData<T>) {
    this.pagingData = pagingData
    if (lifecycleOwner != null) {
        submitData(lifecycleOwner.lifecycle, pagingData)
        return
    }
}

But when I call adapter.insertHeaderItem(VideoCommentInfo() ) method multiple times, only the last piece of data can be displayed.