SpriteRenderer required component for hybrid?

If I remove the SpriteRenderer component from an entity prefab, none of the other hybrid (MonoBehaviour) components get added during conversion.
After some testing, it seems to be if you don't have at least one of the types from Unity.Entities.Conversion.CompanionComponentSupportedTypes on your GameObject, then none of the other hybrid components will get added.
They all show up as missing.

During conversion, I can add any MonoBehaviour class via AddComponentObject but only if I also have one of the required types on it?