PHR application services
These are not a certification milestone. Nothing here is required to certify as a PHR.
They are application features a PHR may offer: teleconsultation, nearby facility search, ambulance booking, blood bank search, scan and pay, PMJAY facility discovery and NHCX coverage lookups.
They sit apart from P1 to P3 so that nothing here implies a PHR must build them.
The full operation list is in the PHR application services API reference.