I agree but even if you take materialism for granted, we’ve yet to uncover the exact biological mechanism. It’s entirely possible that it is unique to carbon-based and/or analog brains.
Turns out that if you get the structure right you can mimic the effect. Mimic the brain structure in silicon and you will get a similar effect. Just like how birds and airplanes are similar but different.
And no there is no proof that quantum effects play a significant role.