Moving from List[IO(Abstraction[List[A]]]] to IO[Abstraction[List[A]]] using fold and empty instance of case class

Question

First I have a case class defined as (this is part of a library):

final case class Abstraction[A](
    result: Either[AbError, A],
    status: Int,
    info: Map[String, String]
)

I want to use it as a primary component for fold in order to go from List[IO[Abstraction[List[A]]]] to IO[Abstraction[List[A]]].

As I read I thought of making it an instance of Monoid to define the behavior to merge the final result.

My proposition is as follows but I know it has mistakes as I'm not grasping it very well.

implicit val instanceabstaction : Monoid[Abstraction[A]] = new Monoid[Abstraction[A]] = {

    def empty: Abstraction[A] = Abstraction(Either.empty[AbError, A] , 0 , Map.empty[String, String])
    def combine(x: Abstraction[A], y: Abstraction[A]): Int = x ++ y
  }

If there is any other way to achieve this, I'm open to propositions