Route AP invoice approval to project team member

Summary:

Route AP invoice approval to project team member

Content (required):

We are trying to route AP invoice approval to a team member called Billing Manager on the Project.

According to functionality delivered in 20B this should be feasible

When adding the user ProjectTeamMember.teamMemberUserName in the then clause of the FinApInvoiceApproval rule we get the error: 'The identifier "ProjectTeamMember" is not valid here'

Routing the AP invoice approval to the project manager is working fine.

Is there anyone else who managed to get this functionality working?

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

22A

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