Yes, the 108W Pro USB-C PD Desktop Charger can charge a 2019 16-inch MacBook Pro using the 90W USB-C PD port.

• The 90W USB-C PD port delivers slightly less power than Apple's original 96W adapter, but still charges the 16-inch MacBook Pro effectively while providing stable power for operation.
• The 90W USB-C PD port also powers 13-inch and 15-inch MacBook Pro models (2016 to 2019).

Charging cables are sold separately. For the fastest and safest charge, use the original device cable or a certified cable.