LazyListTabSync.kt

@Composable
fun lazyListTabSync(...): TabSyncState {
    ...

    LaunchedEffect(lazyListState) {
        snapshotFlow { lazyListState.layoutInfo }.collect {
            var itemPosition = lazyListState.findFirstFullyVisibleItemIndex()

            if (itemPosition == -1) {
                itemPosition = lazyListState.firstVisibleItemIndex
            }

            if (itemPosition == -1) {
                return@collect
            }

            if (lazyListState.findLastFullyVisibleItemIndex() == syncedIndices.last()) {
                itemPosition = syncedIndices.last()
            }

            if (syncedIndices.contains(itemPosition) && itemPosition != syncedIndices[selectedTabIndex]) {
                selectedTabIndex = syncedIndices.indexOf(itemPosition)
            }
        }
    }

    ...
}