A fix adapter is as good as a CH connector, but you may not be able to plug other devices into a multi-plug socket with one attached. The Mi Official Flagship Store sells the Air Fiyer with a 5-year guarantee as a CH edition, which has a CH connection. However, technically speaking, you can also cut off the Schuko plug and simply attach a CH plug yourself, but you will lose the warranty.

It would be nice if Digitec would go the way of the Mi Flagship Store instead of the adapter, while retaining the warranty.

Yes and no, there is a transition plug that snaps into place and then stays on.