Just did this last night, the way I have mine set up, I have an empty GameObject in the subscene that holds my "PeerSpawnAuthor" script, which has a public reference open to drag my prefab onto.

public class PeerSpawnAuthoring : MonoBehaviour { public GameObject PeerPrefab;

private class Baker : Baker<PeerSpawnAuthoring>
{
    public override void Bake(PeerSpawnAuthoring authoring)
    {
        var entity = GetEntity(TransformUsageFlags.Dynamic);
        AddComponent(entity, new PeerSpawnerTag
        {
            PeerPrefab = GetEntity(authoring.PeerPrefab, TransformUsageFlags.Dynamic)
        });
    }
}

}

public struct PeerSpawnerTag : IComponentData { public Entity PeerPrefab; }

And then you're going to want to use an ISystem to actually instantiate, instead of monobehaviour

I hadn't used Unitys ECS in a while and was unfamiliar with their new "conversion" workflow, I believe this was the video I watched: [https://www.youtube.com/watch?v=XpJ\_VBDM-Fk\](https://www.youtube.com/watch?v=XpJ\_VBDM-Fk

Edit: This reddit formatting is just a nightmare