they have the 787-8 version, where no operator in the world managed to fit in a first class. second, airlines around the world are progressively taking a view that F is an indulgence they may not want anymore and removing from a lot of their planes, perhaps because it goes empty (revenuewise) most of the time.
I was speaking to some FAs on my recent AI Dreamliner flight and they all told me that F isn't working for AI and the chances of new planes having F is almost nil.