How to route invoice approval to primary project manager

Summary:

Customer has a requirement to route AP invoice approvals using job level hierarchy, beginning with the primary project manager.

Content (please ensure you mask any confidential information):

Most projects have more than one PM, so routing using the PM as starting participant routes the initial approval to both PMs, then goes up both of their supervisory chains. Is there a way to only route this job level approval to the primary PM and go up their supervisory chain?

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

25A

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