Doesn't matter if it's life saving, right? If you argue based on bodily autonomy, and then support vaccine mandates, you're not consistent regardless of what you think the vaccine does.
Vaccines are something that touch on community health. When one person chooses not to get vaccinated they are putting everyone around them at risk. At the most extreme extent, abortion affects the potential parents, the potential life, and their families. It's a different risk calculation. A woman pursuing an abortion is making life and death decisions for (at most - because not everyone believes the fetus is a life with rights) two people. Someone not getting a vaccine in a deadly pandemic is making decisions that impact life and death for their whole community.
Yet, again, odd silence from the pro-choice crowd. Clearly they don't believe in choice nor bodily autonomy.
Abortion on the other hand does always affect other people, if you believe the fetus is a person.
But most importantly, yes you do have to be consistent. If you can't be consistent because you feel it requires adopting extreme positions then you need to rethink your moral code, because clearly, you may find that your position isn't as morally clear as you thought.