This has been there for a while now (at least a month and a half, when I used it). The problem was that it was a bit buried; the missing miles request page listed physical addresses as if that was the only way to file the request for partner flights, but the online form was available even back in late April.

Now, they have prematurely removed BD from the list (there are still people missing BD miles), and are missing some other partners (Air China, for example)...