Dygma recommends using the supplied cables when setting up your keyboard.
For instance, when connecting the two halves of the keyboard with the Neuron, it's advised to use Dygma's short supplied cables (30 and 50cm), which are USB-C 3.0 and specially shielded.
However, when connecting the Neuron to your PC, there's a bit more flexibility. You can use a high-quality USB-C 3.0 cable or even a USB-C 2.0 cable without it necessarily being the one provided by Dygma.
Don't forget that you can always visit Dygma's store to purchase an extra set of cables.