What should I use for mortar or concrete to fill in the hole on the side here? Previously, there were bricks with regular lime mortar, which someone later poured concrete on, but it cracked and separated from the rest of the stairs.
I am aware that the entire staircase is moving and I will probably need to redo it in about 5 years or so, it’s just a lot of earth and debris behind it and it's not done properly. I just want a solution that will be good enough and look nice in the meantime. Repair mortar? House fix?