How to edit Order Confirmation Widget for Service Portal

https://support.servicenow.com/kb?id=kb%5Farticle%5Fview&sysparm%5Farticle=KB0723600

Navigate to "Service Portal" > "Widgets" in the left side pane of your instance and select "Catalog Checkout"

lone the Catalog Checkout widget and give it a unique ID and name

Make any edits needed to this cloned widget (html, css, js etc...) and save.

Clone the "SC Catalog Item" widget (since this is what calls the checkout widget modal) and give it a unique ID and name

In this cloned widget, do a search for "sc-checkout" (2 entries) and replace those values with the id of the cloned "Catalog Checkout" widget. It should be in the "server script" portion

Edit the Service Portal page, "sc_cat_item" in the page designer to replace the "SC Catalog item" widget with the new cloned version.