If you accept the premise that the consciousness is computable then pausing the computation can't be observed by the consciousness. So the world being a controlled workspace in my eyes doesn't contradict a consciousness existing?
Maybe it could be a very abstract, fleeting, and 1-dimensional consciousness (text, but no time). But I feel even that is a stretch when thinking about the energy flowing through gates in a GPU for some time. Maybe it's 1 order above whatever consciousness a rock or a star might have. Actually I take that back - a star has far more matter and dynamicism than an H100, so the star is probably more conscious.
However, the point I'm making is that even assuming an agent/thing is capable of achieving consciousness, it would have to have a suitably complex environment and the capability of forming an independent feedback loop with that environment to even begin to display conscious capability.
If the agent/thing is capable of achieving consciousness but is not in a suitable environment, then we'd likely never see it doing things that resemble consciousness as we understand it. Which is something we have seen occur in the real world many times.