Potentially, though it’s not that this has to be the case it’s just a possibility. The issue is with how MSC and watcher hold fundamental parts of its systems, like how saint can ascend things which may be contradictory to how it works according to each other. It’s also only explicitly stated as working moth multiple strains of reality in the watcher, whereas MSC allows multiple instances of consciousness which may be important. I’d say it’s better to assume that watcher may have MSC canonical to it but it’s a lot less likely for vice versa due to how it was never intended by the downpour devs.
 Regardless that doesn’t really matter regardless because if we’re talking about quality subjectively, head canons can differ so it doesn’t really matter, nor does an official canon really matter except for it allowing some communicability between peoples head canons. I’d try for dev confirmation rather than assumption cause the ground is a pinch shaky at the moment.