Discovered today. Didn't charge.
This location is not listed on the Swisscharge map, but it has a Swisscharge QR code and it is valid. So I guess you would also be billed the same price if you scan a Swisscharge RFID.
The sign under the charger asks for the parking spot to remain free for users of the charging station. It's not explicitly said but it seems like this is available for the public.
There are rabbit figurines watching over the charger from the window 😂