In theory, you can contact one of the DWP offices dealing with your claims and they should be able to tell you about the other DWP benefits that you are receiving but I have no idea how this would work in practice, especially if you want any details.
If you do want details then you would have to contact each office, the contact information will be on any letter that you have received about that benefit.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems