Is it possible to enable approvals only for a particular module in Zoho Books?

In Zoho Books, you can enable approvals for the Sales or Purchases module as a whole. Doing this will enable approvals for the Invoices, Recurring Invoices, Quotes, Sales Orders, and Credit Notes modules under Sales, and Bills, Purchase Orders, and Vendor Credits modules under Purchases. You cannot enable approvals for a particular module under the Sales and Purchases modules.