I don't understand why you want an adapter for this switch, it's totally impractical. The power cable is plugged in. So it can be completely replaced with one that has a Swiss type 12 plug and does not need an adapter.

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Digitec (or any other Swiss dealer) is obliged to supply electrical appliances with a Swiss plug. If the appliance has a foreign plug, a suitable replacement cable should be supplied if the mains cable is pluggable or alternatively if the mains cable is permanently connected, a suitable adapter should be supplied.

If the appliance is delivered without a suitable plug, complain to the customer service and insist on a cable or an adapter, free of charge.

Info Digitec --> https://helpcenter.digitec.ch/hc...
Point 1 --> https://www.esti.admin.ch/de...