Equal protection only means you have equal access where access exists. If you live in say, Alabama and abortions are banned, that doesn't prevent you from flying to say California and having an abortion. Alabama has no say in that. The state doesn't even need to know you had one. You had equal access to everyone else in California and equal non-access to one in Alabama.
Equal access doesn't mean you have equal access regardless of what state you are in. If it did, then you'd have the right to own a firearm and carry it concealed in all 50 states because some states allow that while others don't.