By duplicating a product template with the "Add to Cart" button hidden in the Shopify theme editor, you can create a pre-release version before purchasing begins. However, you should be careful when doing this, because there is a possibility that users who are familiar with Shopify may be able to purchase products that should not be possible to purchase.
Points to note when using pre-released product templates that cannot be added to the cart separately from regular product templates

[How to prevent products from being purchased before publication] Keep inventory at 0 until the publication date

