The old lady is doing the late EWR rotation today, so I think it's safe to say airlinerwatch.com is far from the truth.
Also I strongly doubt any spare parts will be returned to SK after the old lady has been parted out. Mainly because A340 spare parts are plenty available and cheap, so why waste money on disassembling the bird in a way that spare parts can be reused and the pay for getting heavy pieces like old engines shipped back to SK when the last A340 is expected to be WFU by end 2021. SK is probably getting a better price for selling the bird as is and leave it to the new owner to decide which parts can be reused and which can't. Had it been an A330 it would have been a different discussion.