She -Hulk vs Magneto – She-Hulk has the superhuman strength upgrade in play. -Magneto has the Magneto’s…

No. After you attack Magneto, a timing window opens for Response abilities triggered by the attack, where Forced Responses are resolved first and Responses are resolved second. You first check if you can resolve the Forced Response on Superhuman Strength and see that you cannot, then you check Magneto’s Armor and see you can resolve its Response so you do. You do not then retroactively re-check Superhuman Strength, as its timing window already passed.