can potentially develop cancer much like their cis counterparts

No. Very much unlike their cis counterparts, a female transperson has no uterus, no fallopian tubes, or any other part commonly found in a vagina. They can develop topical cancers such as skin cancers or subdermal cancers as in literally any tissue anywhere in their bodies, but those are not cancers generally found during a pap-smear (which is the primary domain of a gyno). Any sufficiently skilled GP or dermatologist would be equally or better suited.