Not an expert on this but I've seen a couple of explanations of what a "Cash Create" means, and this is the sort of thing I see:

Not an expert on this but I've seen a couple of explanations of what a "Cash Create" means, and this is the sort of thing I see:

My understanding is the existing Spot ETFs in Canada (which we've had a couple of years now) use Cash Creates and they've always tracked the BTC price well.