The trick is always to just use the website of the airline you’re flying with. With QR its the same PNR as BA, so it’s quite easy. No point trying to sort seating out with BA at all. I’ve booked with BA and flown QR a few times, now I just add my booking to the QR app (I created an account with them although I send all my avios back to BAEC) and manage it entirely through that.

I have found that QR seem to undergo a lot of equipment changes which result in seating moves that you don’t get informed of.