FaceRecognition : installed, working, but nothing to access the produced clusters?

I’ve successfully installed and run face recognition into my nextcloud instance. A lot of images have been processed in background, a lot of faces and clusters seem to be available.
However, i have no way to “see” them.

I have no “persons” menu in the files application and the “persons” menu in photos application open the settings page of my nextcloud and asks to download and install the “recognize” app (from Marcel Klehr).
Since i did try “recognize” app before “face recognition”, i guess there’s a mixup here, but can’t find my way through.

Any idea how i could solve that ?