With recable.eu you get repairable charging cables, fairly produced in Germany, to your smartphone. USB-A, USB-C, Micro-USB, Lightning - we have them all!
Although, today we feel USB 2.0 is pretty slow, it is literally "Hi-Speed", USB 3.x would be "SuperSpeed".
As thir connectors arent glued or molded to the cable, they can be replaced without damaging the cable by using a soldering iron. For a cheap USB cable, you would need to cut off the connector, remove the isolation and the solder a new connector to it.
That's anothera different question. Not needing to buy a cable because you've already got one is one aspect of sustainability. However, in future, more people will have to buy cables (and chargers) as the will no longer be bundled with new smartphones.
I have no idea why they only fulfill the USB 2.0 specification and not 3.x either, except using them for file transfer being a more rare use case than charging.