PO Approvals to be sent to Project key members

Hello Friends

We are in the process of implementing BPM for Purchase orders, in EBS we use AME to route the notifications to Project key members, but in BPM we are struggling to do that as ours is Saas environment. Is there any standard way of sending PO approval notifications to project key members in Fusion. We are implementing version 13.

Your inputs are sincerely appreciated

Thanks

DIlip