Send message with Approval Requests

Hello, I'm looking for a way to use Approval, but I'm unable to pass any information with variables to the person doing the approval (much like how a Notification supports variables).

When an Approval is sent, I'd like to include some Input Fields to them so they can accomplish their duties accordingly.

I'd like to use Approvals because then I can include a condition where when the approval is complete, I can send a notification to the correct parties.