I can't find any announcement by IONITY of when the 2 additional chargers were added. Was it done around December 23, 2022 like the north area, but they forgot to mention both areas in the anouncement?
The only 2 negative data points I have are my own pictures from June 2022 and a comment on Chargemap from August 2022 saying that 2 out of the 4 chargers are out of order. So the additional chargers weren't installed at that date.
One positive data point is a Facebook comment on a re-share the north announcement saying Süd was already done https://www.facebook.com/groups/693087218544359/posts/885244705995275/
Süd wurde auch schon erweitert auf sechs. Die Postings kommen meist immer etwas zeitversetzt
My pictures confirm that chargers 1-4 were installed first on the left, and the 2 additional spots for 5-6 were to their right, with the floor already painted.