Defaulting Hiring Manager to the Position's Parent Position incumbent

Summary:

Content (please ensure you mask any confidential information):

How can we default the Hiring Manager to the Position's Parent Position incumbent, specially in 25B the Hiring Manager field is defaulted to be blank.

We already have Position Sync setup

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

25B

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