With AS award ticket you can't do anything on Starlux' website - this means missing out on pre-select meals, pre-order duty free

FYI I've made 2 separate JX bookings using AS miles in economy between NRT and TPE. The Dec 1 booking I was able to call JX US call center and have "forward" seats assigned - this was under the 3-category economy so AS tickets were assigned either as "Basic" or "Full" which included "forward" seat selection, 2 piece luggage, etc

The Dec 8 booking I have not been able to get seat assigned, this is under the 4-category economy as per picture above, so now it's either "Limited" or "Savings", uncertain how much luggage I would be allowed, but not planning to check-in more than 1 piece anyways