Cathay Pacific first class award seats especially have gotten much tougher to book in recent months. Cathay still regularly makes unsold seats available in the week and even day prior to travel, but advance award availability can be scarce. Business class awards aren’t as easy as they used to be, but aren’t as restrictive as first class.
…[W]hen you see award seats available online using the customary sources for this data — the Qantas frequent flyer website and the British Airways site — but an American telephone agent says it isn’t available, it’s natural to think that the space is being blocked (either on the American side, or that Cathay is imposing point of sale restrictions to prevent American’s members from booking the space).