The fallacy of methods
Suppose your company builds space probes which analyze asteroids for mineral value. You are testing a space probe, and you use its engines to redirect an asteroid so it hits your ex-wife's house. There's no law against murdering people with an asteroid. The law hasn't caught up to this novel approach. So I get off scot-free. Right?
Wrong. The law doesn't care about methods.
So you are saying this should be different because you used an abortion pill instead of some other method. Nope. No bearing on the subject at all. If non-consensually terminating the fetus is illegal (which it is, in most of the jurisdictions you name), you're guilty of it.
Is it illegal? In most of the jurisdictions you list, abortion is legal, but the path to legality was tortuous (Roe v Wade, coat hangers, all that). A strong argument against legalizing abortion is the image of a woman being dragged kicking and screaming to an abortion, by a man - or worse, a court! As such, it would greatly aid society's comfort with abortion legality if the question of coercing, manipulating or otherwise compelling an abortion was addressed in statute. As such, I expect most of them will have codified law to prevent that.
After all, non-consensual abortions are one place almost everyone stands together. They're either against abortions generally, or against denial of choice for the woman.
Methods may be illegal, also and separately
For instance it's illegal to murder someone. It is also illegal to shoot someone with an enhancer if the effect is death. In that case this is not one crime, but two.
Giving a prescription medicine to a person not on the prescription is illegal (and dangerous, because the prescribed person has been cross-checked for allergies and drug interactions. Not clever at all to accidentaly kill the mother too!)
You would be using the abortion pill inconsistent with its labeling and instructions, which is illegal. Seriously.
- If your application method is nonstandard, e.g. breaking open the pill and dissolving it in a drink.
- If it says "this is for use by a woman who wishes to terminate her pregnancy".
Using a medicine improperly, in a manner which causes fatality, may well be an enhancement on the general illegality of improper use.
Wow, I just had a proper reason to use a gender-forced pronoun.