Exapandable GridLayout RecyclerView

Question

As shown in image

I want to make similar expandable GridLayout RecyclerView.

1. Initially, there will be a RecyclerView, which will contains Grid Laytout structure with span count=2.
2. When I click any Item of the grid, it will exapand a layout below that item, like in image and child layout will then again contain a RecyclerView to display child items.

How I can achive this.

I have tried some libraries like FlexboxLayoutManager but it doesn't show the desired results.