Here is a public toilet that I die not find via search function. Will check when I get home.

Public.
Fee: 1,5€
Opening hours (according to worker there, no sign) 9:00-18:00

via StreetComplete 45.1

Attached photo(s):
https://westnordost.de/p/104936.jpg
https://westnordost.de/p/104937.jpg