This is just a small tip for those who may not know this.
I know some may mine backwall at every block but there is a simpler solution to this.
First you will need a tool to mine the top of the backwall and some blocks.
Got it? Okay, let’s begin.
Start by mining the top like shown here
Then place a block under where you mined, then mine it.
Then you got a mined backwall without the effort.
Hopefully this helped a portion of people who may not know this trick
thinks… oh no, did I accidentally show my moon. Oops!