95% of my UA tickets were not purchased directly from UA (UA.bomb and phone) because I could always find cheaper prices elsewhere, but that's another topic. But they always appear on my Itineraries on UA.bomb after I call MP and added my account number. Last month I had a trip with LH and UA legs, the entire itinerary appeared there.
Next week I have a trip with all LH legs. I called MP and they could see my itinerary and added my MP account to it but it does not appear UA.Bomb