I've noticed that since 1003, we haven't seen Kid use punk rotten at all. I find this odd given how he claimed his strategy to beating the yonko was to crush and compact them to death, something he'd only be able to do with the giant arms of punk rotten, yet despite fighting big mom for quite some time, he is still using his standard metal arms.
I think the reason for this is that Kid changed strategies. He saw how effective internal damage and haki was against kaido and realized that punk rotten alone wouldn't cut it.
I think his new strategy will be to try to hurt big mom via electricity(which he can induce in his metal via magnetism), while also trying to use ryuo.