According to Migrol app, this location is only during business hours. But there are a few sessions recorded on Sundays.
On Google Street view I can see the parking entrance just labelled "Einkaufscenter". We cannot see any indication of opening hours from outside. On the Google Maps marker for the parking there's a picture of the parking prices from January 2025. It shows the parking appears to be 24h, but at a very steep price of 5CHF/h outside opening hours. There's 1 free hour during opening hours.