Assume a “normal” person weighing 75kg. The thumb-rule suggests that each pushup is an effective 48kg. Say they can do a one-arm pushup. When you take into consideration the extra coordination required, wider stance, and a somewhat different movement compared to a symmetrical regular pushup, would they be pushing 50+ kilos or way less?
Asking because if the answer is “more” and not less, my first one arm pushup could be immediately followed by a 2 plate bench PR.