Finnair’s system is just weird like that, especially when the ticket is booked through AA. You’ll often see the meals listed but won’t get an actual selection screen online. Happens a lot with partner bookings.
Usually you either pick on board or the option opens much closer to departure, sometimes only a few days out. Worst case, the crew will come around and let you choose after takeoff. In business they usually cater enough that you still get a choice.
It’s annoying, but not a sign something is broken or that you’re stuck with whatever’s left.
