It would be nice if the Addressables package had a built-in AssetReference type that could be used with scene assets – something like AssetReferenceScene. It’s relatively straightforward to roll your own, but it’s kind of a hassle, especially when the library already provides other helper asset reference classes like AssetReferenceGameObject, AssetReferenceSprite, and AssetReferenceTexture.
Here is an implemention that someone else posted previously in these forums.