Approval rule for amount on hold

Summary:

Is it possible to create an approval workflow to approve the amount on hold?

Content (required):

For example the PO is 1000 EUR and the AP invoice is 1100 EUR.

At our client they have a requirements that the 100 EUR over invoiced amount to go into the AP approval workflow and after the approval the hold is released automatically.

Is it possible to create this in the AP Approval Workflow or the Hold Resolution workflow?

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):