I'm sorry, but I don't understand your question.
A hub between the KVM and the MacBook? What kind of hub? A USB-3 hub with a USB-C connection to the notebook?
But what would that be good for - apart from increasing the susceptibility to interference?
Or is your real question whether/how the Delock KVM can be operated with USB-C on the MacBook?
For that I would rather recommend something like this:
Satechi USB A - USB C (0.15 m)However, you have to clarify with Delock whether the Mac has the necessary drivers and whether the KVM can work at all.