https://www.pointhacks.com.au/how-to-seat-select-with-reward-booking/
Do I pre-select my seat with frequent flyer program or directly with airline?
Feb 13, 2020 - You may use your frequent flyer points to book a flight with a partner airline. In this case, who should you contact to choose your seat?
select my seatfrequent flyer programpredirectlyairline