Sigh probably true lah. But I already got normal sports band, so don’t hoot leather a bit wasted.
So if you use Apple Watch Studio to select your watch/strap combo, stocks really depends on availability, while some are not even available. My wife's 41mm midnight GPS model with Dark Cherry sport band was also customised from Apple Watch Studio and fortunately able to pick up at Apple Store today. So for those customised ones which are not part of the standard ones, the label behind the box does not state the type of strap, only the size of watch and colour.
In all on 8 October, I took more than 30mins to finally pre-order both her's and mine's.