I don’t want to be too confident on something like this, but I feel like consciousness comes somehow from the material body (and surrounding world) in all its complexity, so transplanting consciousness absent transplant of physical material wouldn’t be possible in theory. This assumes it’s a consequence of the structure of things and not something separate, but I think that’s a reasonable guess.

The way I think of it is that consciousness is a side effect that arises from the complex circuitry of our brains

I also don't want to be too confident, I'm not an expert on this. But I don't think consciousness is tied to any one physical component of our brains, it is something that only happens when the whole system is assembled

This is why I don't think you can move consciousness. You can create a new identical brain, but that create a new consciousness. How do you transplant a side effect?

It would be like saying "we can move the heat that this circuit is generating to this other circuit". Clearly you can't really