Is Apple 60W USB-C power adapter compatible with mag safe duo charger

Yes.

How to use your MagSafe Duo Charger with iPhone 12 models and Apple Watch - Apple Support

"Use the included USB-C to Lightning cable to plug in your MagSafe Duo Charger to a recommended 20 watt (W) or greater Apple USB-C power adapter

* The Apple 29W USB-C Power Adapter isn't compatible with the MagSafe Duo Charger."

How to use your MagSafe Duo Charger with iPhone 12 models and Apple Watch - Apple Support

"Use the included USB-C to Lightning cable to plug in your MagSafe Duo Charger to a recommended 20 watt (W) or greater Apple USB-C power adapter* or a compatible third-party USB-C adapter. You can also connect to a USB-C port on a Mac or PC."

I am confused by the fact that the port ( where I plug the cable into the charger) on the mag safe duo is a lightening connector. How is that compatible with a usb-c power adapter?