Here is the Service Manual for your laptop:
Manual
That article you link is very general and does not spell out very well that not all USB-C is created equal. You need to be sure "Power Delivery" is on the specs of the port. Not "Sleep and Charge". Your port has video out (DP) and data only. It's not Thunderbolt so will not support an eGPU and its not Power delivery. Supported AC adapters are all barrel type not USB-C. Just generally, if an HP laptop can be charged via the USB-C port a USB-C charger will be included with the laptop; otherwise not. It's either a charging port or not: no way to make it into a charging port with BIOS or a driver.