My eyes always glaze over terms like "fundamental" and "essential". Philosophers do seem to like such terms, but what precisely those actually mean seems elusive.
There are varying views about consciousness, even among scientists. If you're talking about an irreducible distinction between consciousness and what we observe, that's presumably dualism.
On that note, we have managed to reduce consciousness down to different physical components, we have shown how damage to the brain directly affects conscious experience, we've shown how various substances do the same, along with showing a well-evidenced path of the natural development from single-celled organisms to human with human brains.
Given all of the above, it's not surprising that the non-physical views of consciousness are losing popularity among scientists and among the general populace. Rates of theism, while distinct from dualism, is a pretty good indication of this... although both of these things are also strongly affected by whether religious claims can stand up to scrutiny.
If there were a dogma towards dualism that's precluding scientific advancement, we wouldn't expect as many of the advancements above.
Such a dogma may be more common in the general populace. A neuroscientist will have a hard time doing their job if they hold that consciousness is irreducible... given that their job is literally the reduction of consciousness.
If there were a dogma against dualism (or against theism or against the supernatural), we'd expect to see some evidence of this, which I haven't seen (although those who think there is such a dogma would presumably say I'm adhering to it too... which is an easy way to dismiss the arguments against claims you make). The typical arguments I've heard along these lines is that study of the supernatural is dismissed or looked down upon, but the response to that is that said study is based on unsupported presuppositions, it follows methodology that varies from questionable to atrocious, or it outright lies about things (scientists look down upon bad science). When good methodology is followed, the supernatural claims cannot be verified, or are falsified.
Non-metaphysical distinctions
It's probably fair to say there's an epistemic distinction between experienced and observed consciousness (solipsism) - the only thing you have direct experience of is your first-person experience. Everything else is inferred. But this doesn't necessarily mean there's a metaphysical distinction there.
Maybe there's also some categorical distinction between observer and what is observed, but this also doesn't translate to a metaphysical distinction.
The shifting window of supernatural claims
There's an interesting side note here about the shifting window of supernatural claims.
You'd probably have been burnt at the stake a thousand years ago, had you dared to utter things that are widely accepted facts (even among dualists) about consciousness and the origins of humans, life, Earth and the universe in the modern day (although some of those things are less widely accepted than others).
You may have received a similar response some time before that, had you dared to hypothesise that weather is caused by natural processes and not by gods, or that viruses and bacteria cause disease, instead of gods, or that we're just some speck in a vast universe. It wasn't that long ago that someone challenging the idea that Earth was the center of the universe wasn't received well.
The dogma has always been in favour of supernatural claims. We've shown that those claims don't hold water, and that's been met with accusations that the dogma has flipped to be against supernatural claims, but those accusations don't hold much water either. The evidence just isn't on their side.
Scientific ignorance of philosophy?
It's probably fair to say scientists would benefit from knowing some basics of philosophy.
Similar to how a builder might benefit from knowing the basics of chemistry and physics. A builder may know a whole lot about weight distribution and load and effects of wind and the weight capacity of various materials and how they are affected by various things. Such a person may be a great builder 99.9% of the time, but there may be some rare edge cases where a lack of knowledge of the underlying foundation of all of that (chemistry and physics) may lead them to the wrong conclusions about how buildings would behave in some unexpected circumstances.
Following the scientific method and Occam's razor is going to lead to good science almost all the time. But if you don't understand the underlying philosophical foundation, you might miss the mark in some rare cases.
But I'd say that probably carries a bigger risk of supernatural claims sneaking in, more than anything else. Although I've also seen some scientists criticise supernatural proponents for the wrong reasons, e.g. dishonesty instead of cognitive bias... but that may be more about psychology than philosophy.