A lot of the carcon fibre (or GLARE) bit from underneath the aircraft seem to have cracked and / or broken rather than bent like aluminium would, should this give us pause when thinking about full CF fusalages
That's the remains of the belly fairing. It's not primary structure, and is just there for aerodynamic purposes - fairing the wing to the fuselage and containing the landing gear, packs and much of the hydraulics systems.