@sanra84 you can check following
BuddyPress Links in WordPress Menus
You can add them as a dropdown menu which will display for logged-in users.
thank you very much, i will try this now. which also surprises me is that some pages like activity have no content, is that normal: https://www.dasnetzwerk.net/aktivitaet/
and the activate and regristraion sites are redirect to the startpage.
do you have a tip for me?