When trying to get into national honor society, what are some examples of leaderhsip positions? Is being mvp of a team a leadership position?

It can be. It depends on if you have any other leadership positionsl, being a leader doesn't always mean that you have been an appointed leader, what did you do on the team that showed leadership? These are all things you need to think about.
A big thing with NHS is the grades and volunteer work, in some schools you need to have so many hours of volunteer work to maintain membership. But you probably already know that.
Good Luck with getting in!

A leadership position is one where you are responsible for supervising or managing a team of people.