While setting the correct expectations with your customers regarding when will they get their order. You can enable Preorders for specific products/variants, Collections or All Products. You can also conditionally enable/disable preorders based on whether something is in stock or out of stock or if you have incoming inventory. Limit the number of preorders you wanna accept or Show a delivery text on product, cart, checkout page. This can be used, as follows:

Gift Pro : Automatically add to cart free gifts or product add-ons based on easy custom rules and widgets. Offer add to cart upsells like Free gift BOGO Upsell, Free gift Bundle offer, Tiered free gift and become high-converting upsells business. Generate cartbot like rules for cart upsells based on total cart value, specific product, collection, customer tags to offer Gift with Purchase (GWP). With a simple UI, creating easy gift rules for automatic discounts can be setup within a few clicks.

Turn stockouts into sales with automated Back In Stock & Low Stock alerts. Add a "Notify Me" button to out-of-stock products & let customers subscribe for restock updates via email or SMS. Automatically send Back In Stock email & SMS alerts when inventory is updated, or send reminders manually anytime. Get instant low stock & out-of-stock email alerts, track demand and conversions with analytics, manage multiple locations, and customize buttons, popups, and email & SMS templates with easy setup.