Thanks for raising this concern here, Anatpmlv.

We appreciate you for utilizing the new AI feature of QuickBooks Online (QBO) in creating an invoice. Let me share info about generating invoices via email.

Please know that when creating an invoice via email, only the Date, Subject (Products & services name), and Amount can be set automatically. 

However, in the amount section, only the sales price you set for that product will be shown and can be recorded as one product. This means you'll need to modify the Qty (Quantity) and the invoice Amount if it has multiple items.

I'll also add this article if you want to personalize your sales form: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Feel free to return here if you have additional questions about generating invoices in QBO. We'll be willing to help. Take care, and have a pleasant day.