Unable to make columns Non-Editable on "Create Invoice" page in Supplier Portal.

Summary:
We have received a requirement from our client to make specific fields—namely Ship-to Location, Quantity, Price, and Tax Classification—non-editable while creating an invoice through the Supplier Portal. The objective is to ensure that suppliers are unable to modify these values during the invoice creation process.

Content (please ensure you mask any confidential information):
We have received a requirement from our client to make specific fields—namely Ship-to Location, Quantity, Price, and Tax Classification—non-editable while creating an invoice through the Supplier Portal. The objective is to ensure that suppliers are unable to modify these values during the invoice creation process.