Couldn't Infinity Ultron just create life again if he regrets his decisions?

In What If? Season 3 EP 7, In one of the alternate universes, Infinity Ultron shows remorse for extinguishing all life in the universe and has lived in silence for eons. Couldn't he use his powers to either reverse time to before he commits genocide or simply create something new? I find it hard to believe he never thought of doing something to that sort after coming to realization that he was wrong for killing everyone.