There seems to be either a bug or something more 'secretive' going on; I am unable to find most EW (4U) flights on United.
For example, do LAX-LHR-TXL; the TXL part has LH, Swiss etc with one stop, as the nonstop to TXL are gone. In fact, not on ANY day, any month, can I get EW from LHR-TXL, while they do 'sometimes' show up in the TXL-LHR segment (and on from there).

There continue to be 3 a day, their status hasn't changed, and UA 1K line tells me they see them in their system every day (though we checked a few and they had '0 seats' - when they were all empty).
Anyone has a guess as to what's going on? EW is an integral part of UA's Europe connecting network (and of LH).
I'll call UA back later to see if they know something more...