> If you can add a product to your basket, the item is available or will be available very soon.
It may be that the product is waiting to be restocked (in most cases, it will be available within 5 days maximum).
> Once added to your basket, if the product moves to "out of stock" and "NOTIFY ME OF AVAILABILITY" appears, the last available items are in your basket and are therefore reserved for you. You can complete your order.