Earlier quoted context omitted.
Yes. Every conforming cable supports 3 amps and 20 volts. If you think something's incorrect with that, be specific . But the spec is pretty clear. The exact details of the faster cables are murky because there's old and new versions of that section of the spec, but very few devices use enough power to care about that.
USB-C spec is not very clear. And even in cases where it is clear. It’s not followed. There’s so many bad cables around. Cables that work on 1 device but not another, cables which do data and not PD, cables that do PD and not data, USB-C has the nicest plug with the worst experience.
If something breaks that, it doesn't make sense to blame USB. Whatever the manufacturer was doing, it was such a mess that it would fail with any other standard.
Supporting data and PD is just three tiny wires, it's not hard.