Could be, I’m not deeply familiar with Buddhism. There’s still a core “something” in there that’s casting the shadow, but it’s not something that can be interacted with directly so I don’t know if it would fit the normal definition of a “self”. You can only directly interact with the shadows it casts and those shadows are situation-dependent. It doesn’t think or act in isolation.

I suppose one could just pick some specific set of circumstances and call the self that emerges under those conditions the “true self.” For example you could call the version of you that emerges when you’re lying in bed alone at night thinking about the dumb stuff you did during the day your “true self.” But that’s a bit arbitrary.