Is there a way to add a shared mailbox as default buyer on PO

Summary:

There is a request to have the Default Buyer for POs not just be 1 user but a shared mailbox account. Is this possible? How has this been configured in the past and did it work with PO auto-creation? When I created user in security console it wasn't available for me to choose in drop down for Default Buyer on Configure Purchasing Business Function setup

Content (please ensure you mask any confidential information):

same as above

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

24A

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