Put support strut under concrete stair landing

The stairs have been inspected by an engineer and found to be structurally ok. I would feel better if there was a support in place at the far end of the cantilevered platform. The height is about 1.4m. There is some solid cement under the rubble that fell off but it also contains a man hole so perhaps can't be permanently sealed by this work. I am thinking either a builders strut cemented into place in the ground or a column of lesser blocks cemented into place. Will not need to be rendered or other. Task in in Hamilton. It is for the body corporate so will need to be done by a licensed and insured tradesman. Or woman :-)