Auto save on approvals tab

There is an approval tab on the page that allows users to approve or reject a record. The record page and the approval tab are both on the same page. However, if the user updates the record page data  and clicks “Approve” without saving the record first, the updated information is not saved. As a result, the approval process proceeds with old data, which should not happen.

How can we save the data without clicking the save button and then approving the record ?