Question about Apple USB-C Power Adapter

So the battery will not be damaged if I use this charger for the iPhone 15 pro Max?

Yes, you can use this charger for the iPhone 15 Pro Max. The iPhone 15 Pro Max has a USB-C port and supports fast charging with chargers that provide at least 20 W of power. This charger delivers 20 W and supports Fast Charge, which is compatible and sufficient for the iPhone 15 Pro Max.