This location previously had free chargers, as visible in my pictures from June 2022.
The location is listed on the "old" map from Migros website with 2 plugs.
Not sure since when the free chargers have been available. The oldest check-in on GoingElectric dates from August 2021. The location was created in August 2020.
On Chargemap the oldest comment is from March 2022 so it doesn't help narrowing down the date of opening.