The only knowledge I have of Kamala Khan is as a playable character in the Avengers game. You can call me a nitpicking spoilsport if you like, but I've never been keen on growing/shrinking powers. They are too gross a violation of basic scientific rules, without even an attempt at explanation! So suppose Kamala, who by the look of her in the game weighs maybe 80 pounds soaking wet, inflates her fists to five times their normal size. Either the rest of her must shrink in proportion, or the fists are just balloons that hurt nobody. If neither of those happens, then where does the extra mass come from! When she shrinks them back down, where does the extra mass go? You can't create or destroy mass just like that!

On the other hand, if this version is using energy manifestations instead, that is a lot more acceptable. Energy drawn from another dimension (for example), or bio-energy coming from a unique molecular structure, is much more believeable nonsense!