Sorry, I misunderstood you.
Expert flyer will only show you availability in F and A. What matters for awards is O and it's up to LH to open or close inventory as they see fit.
There is availability on 04/20/22 for instance, so it's not that they have zero'd O alltogether but just on dates where they expect to sell revenue tickets.
As a side note, LX F awards can only be booked by SEN and HON, so the overall availability across LH group airlines is poorer for FTL and non-status M&M members.