Thank you for reaching out here for support. I'd be glad to offer some insight regarding modifying client statements.
Currently, the option to customize a customer's statement isn't available. In the meantime, I recommend using the Transaction Statement type which is the closest option to the information that you need. It shows the actual invoice of the customer and amount received when it was paid.
At the top right, click the Plus icon.
From the Create Statement page, select Transactions Statement in the drop-down.