Customizing Order Confirmation Emails

I would like to add some customized information to the order confirmation email customers receive after placing an order, such as the estimated shipping date for the purchased product, the number of store points the customer has earned from their purchase, and a recommendation to visit our other stores. How can I achieve this?

Specifically, for adding the product shipping date to the email, is it possible to specify the shipping date for out-of-stock products somewhere in the Shopify backend? For example, if today is February 7th and the product’s shipping date is May 10th, where can I input this date so that the email can automatically retrieve this information? Thank you!

I’m unsure, but you can use metafields for this. Assign values to the order metafield (which you create) and try to point to the specific field in your email template (you can add dynamic variables in the Shopify native email templates in the customer notification tab).