Ahmad-Hamwi

fun LazyListState.findFirstFullyVisibleItemIndex(): Int = findFullyVisibleItemIndex(false)

fun LazyListState.findLastFullyVisibleItemIndex(): Int = findFullyVisibleItemIndex(true)

fun LazyListState.findFullyVisibleItemIndex(reversed: Boolean): Int {
    layoutInfo.visibleItemsInfo
        .run { if (reversed) reversed() else this }
        .forEach { itemInfo ->
            val itemStartOffset = itemInfo.offset
            val itemEndOffset = itemInfo.offset + itemInfo.size

Ahmad-Hamwi

operator fun component2(): (Int) -> Unit = {
    ...

    coroutineScope.launch {
        if (smoothScroll) {
            lazyListState.animateScrollToItem(syncedIndices[selectedTabIndex])
        } else {
            lazyListState.scrollToItem(syncedIndices[selectedTabIndex])
        }
    }