Of course, understanding the mechanism is helpful if you want control, reliability, and precision over the phenomena, but creation can definitely happen before we can explain it.
Through engineering.
This isn't new by any stretch of the imagination. Throughout our entire history as a species, we've been building things long, long before we had the tools to understand them. We built bridges and massive cathedrals before we invented geometry. We built and optimized steam engines for a century before we developed the language of fluid dynamics to understand why those designs were optimal.
Engineering very frequently is far ahead of the science needed to explain it.
As far as consciousness goes, personally I think it's an emergent property that will arise on its own when conditions are right. It will take a lot of experimentation to establish the right conditions, and then generations of study to figure out why those conditions were ideal for consciousness to emerge.
Because realistically we can't learn about consciousness with a sample size of one (us). We need to study other consciousnesses to understand the why and hows.
animals can have offspring without understanding reproduction
I look forward to more precise definitions.
Without it we can't walk, eat, reproduce, or do anything. I like to think cost viability reasons explain consciousness. I know people prefer metaphysical or quantum magic explanations, I prefer a prosaic one - cost. It's a mechanism to keep our costs offset by gains. Cost can also explain unity - we die as one organism, not each organ on its own.
Of course, you can be like Daniel Denett and bite the definition bullet - he was talking about 'free-will', not consciounsess and that a chess program has the necessary properties.
But, it makes more sense to take conscious experience as more fundamental, what we are directly aware of, and try to explain everything else with that as the base.
Eg.
1. The brain "does cognition".
Cognition <> consciousness.
2. Some philosophical theories have consciousness pre-figuring complex arrangements like the brain.
ie. The brain is not necessarily a pre-requisite for consciousness.