Some basic info about USB

https://lemmy.world/post/19567217

Some basic info about USB - Lemmy.World

It gets even better, each function of the port also needs proper support from the cable. Often cables do not support the full spec of usb to cut costs.

While the symbols in the post are often put on computers, for usb cables this is seldom done (only a few brands do).

Source: had to find a cable that supports both DP and PD to connect a portable external monitor after I lost the original cable. (1/9 cables worked)

Yes, this is incredibly annoying and it's also the reason why some USB cables cost more than others, even they may look the same superficially.
One of those cables that don’t work is rated for like 120W, with gigabit transfer speed… But it refuses to transmit display… Like bruh
1080p at 60 Hz is 4.4 gigabit
Didn’t really think about that one but you’re right damn… (Looked it up, and it depends on the bit depth etc, but it’s actually around 3.2Gbps)… So that explains a lot