In an official post, Sony has announced that no PlayStation 5 consoles will be sold in physical stores on release day (November 12 or November 19, depending on region).
The announcement had already been made for Japan a few hours ago, but now this precautionary measure will be applied to the whole world.
In order to limit crowds and camping in front of stores (as has been the case with each release of a new console), Sony simply decided to take precautions by stopping the physical sale of PS5s in stores.
It will still be possible to order online on day one, to either have the console delivered or to use the click-and-collect policy of your retailer. It is recommended you contact your preferred retailer for more information.