Is the power cable plugged into the power supply to the docking station?
If so, I think it would be better to replace the entire power cable. And not to use an adapter. Fixed adapters can be used if there is no other reasonable solution that can be implemented without major adjustments to the device. At least that is how I have interpreted the regulations so far.
https://www.esti.admin.ch/de...
It is clear to me that Digitec will see this differently. But hardly anyone at Digitec will understand the problem as long as they are not affected themselves and there is a cheaper solution like the one with the adapter.