To add customizations to a product in your menu, click on the three dots on the far right of the product, then select "Edit Product."
In the dialog box that appears, you'll find the Customizations field. To add a customization group, start typing the title of the group you want to add. If the customization group exists and matches the title you enter, it will appear in a list below the field. Click on the group to add it.
Note! The customization groups will be displayed to the guest in the same order as they are listed in this field. Therefore, make sure to arrange them in the order you want the guest to see them.
When the guest clicks on the product, they will now see the customization groups you have added!