Avatar 2 was right on schedule for a December 2021 release date up until March, when production halted due to Covid-19.
Therefore, we can deduce that the Crabsuit might be stored on the Sea Dragon while not in use.
Last December, we got a peek at a different Avatar contraption called the Sea Dragon, a massive mothership that can carry multiple sea-faring vehicles at a time.
Still, the setback means that Avatar 2 won’t come out until December 2022, with Avatars 3, 4, and 5 spread out over the next decade.