Pressure-Cooker Mediterranean Chicken Orzo

In a 6-qt. electric pressure cooker, combine the first 11 ingredients; stir to combine. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 8 minutes. Quick-release pressure., Add orzo. Lock lid; close pressure-release valve. Adjust to pressure-cook on low for 3 minutes. Allow pressure to naturally release for 4 minutes, then quick-release any remaining pressure. Let stand 8-10 minutes before serving.