USB-C describes the physical connector and its signalling pins. Everything a user cares about is layered on top of it and is optional, which is the root of years of confusion.
Three independent questions
Ask what data generation the port implements, whether it carries display output through alternate mode, and how much power it can source or sink. A port may support all three, one, or none beyond basic data.
Cables are equally variable. A charging cable rated for high wattage may only carry low-speed data, and a short high-speed cable may not support the highest power levels.
Reading the labels
Look for the printed speed figure in gigabits per second and the wattage rating rather than generation names, which have been renamed repeatedly. On laptops, the icon beside the port usually indicates display output and charging support; the manual will state the data generation.