Customisations in the Customer Portal

I need my clients (insurance companies) to only see the information that is strictly necessary on the Customer Portal. To achieve this, I am requesting the following changes: 1- Hide the Invoice section on the Customer Portal. 2- Hide the Invoice ID column from the Tickets section in the Customer Portal. This is important because my clients are very sensitive about data visibility, and without these adjustments, I cannot confidently present the portal to them.