Lufthansa (with SQ codeshares) has really attractive F fares to SYD in the A booking class from some European cities (xxx-FRA-SIN-SYD) such as AMS. Unsurprisingly, seats for these A fares are most (if not all) of the time not available.

However, Matrix (even when "Only show flights and prices with available seats" is ticked) seems to look at the "normal A availability" of the FRA-SIN and SIN-SYD segments, without knowledge of the origin (ie AMS) related tight restrictions. Therefore, practically all cheaper flight alternatives presented by Matrix are not there. Interestingly, lufthansa.com on its multicity booking tool, also shows these flights as bookable but then returns an error message when proceeding to payment.

Is there a way to search the really bookable A flights on LH?

Example: AMS-SYD, 1 pax, cabin First class, dates 6 - 20 May 2024 +/- 1 day, routing codes "LH+", "Only show flights and prices with available seats"