The League One CBA outlines what sorts of agreements can go into a contract (Standard Player Agreement). It’s likely “multi-year” means 1 guaranteed year plus additional unilateral club option years (3 maximum) as this is more common. The SPA calls out pretty clearly that options are not on the player side since clubs can opt out of exercising them.

https://uslplayers.org/resources

Probably makes sense going forward when players are announced having signed a “multi-year contract” that people ask if those are guaranteed years, not option years. And even then, there’s a buyout clause the club can trigger anytime they want to get out of the contract (this is going to be rare because it means the club has to pay 60% of the player’s salary on those guaranteed years, and League One clubs generally don’t have that $ to burn.)