ScrollAndWait.kt

 suspend fun RecyclerView.awaitScrollToPositionWithOffset(position: Int, offset: Int) = suspendCoroutine<Unit> {

        val layoutManager = layoutManager as? LinearLayoutManager ?: return@suspendCoroutine it.resume(Unit)

        addOnScrollListener(object : RecyclerView.OnScrollListener()
        {
            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int)
            {
                super.onScrollStateChanged(recyclerView, newState)

                if (newState == RecyclerView.SCROLL_STATE_IDLE)
                {
                    removeOnScrollListener(this)

                    it.resume(Unit)
                }
            }
        })

        layoutManager.scrollToPositionWithOffset(position, offset)
    }