• F222 Baden-Württemberg, the first F125, is currently performing weapon trials
  • F223 Nordrhein-Westfalen, the second F125, is currently performing CMS trials
  • F224 Sachsen-Anhalt, the third F125, is on her initial sea trials since February
  • F225 Rheinland-Pfalz, the fourth F125, was launched in May 2017 and is in final outfitting

After Baden-Württemberg failed the Bundeswehr's acceptance tests last July they're trying to get her into service this year after various refits; she was handed back to the yard in December. Acceptance trials were restarted in April, using both Baden-Württemberg and Nordrhein-Westfalen this time.

Interesting english-language article on the F125's operational concepts:
Not one i necessarily agree with, but interesting.