Well first of all, I don't agree that this is the only good thing AOC has done while in office.
Also, I'm not even implying that AOC is doing more for Texas than Ted Cruz in general, why would she, she doesn't represent Texas. But in this particular case of the Winter Storm and the power outages, then yes perhaps she has done more than Ted Cruz. She acted quickly to get aid for Americans who need it, simple as that.