Yes, your Philips Avent 2-in-1 Premium Warmer & Sterilizer or Premium Fast Bottle Warmer can defrost both breast milk and baby food using the defrost setting.
The appliance defrosts milk to a liquid state and then warms it to the desired temperature.
For baby food, the food is defrosted, and then you must restart the appliance and use the baby food warming setting to warm it to the desired temperature.