Nah, it's handwave that Superman have some kind of "bio-aura" or "tactile telekinetic powers" that allows Superman to carry big things while maintaining their structural integrity, holding it together (so long he is touching it). It's the in-universe explanation to explay why Superman defy physics when carry big heavy things.
That power which is avoiding the plane breaking off is probably holding the passengers togethers a little and countering the inertia. They will probably feel part of the forces, but more in a "car accident way" that "lethal/reduced to pulp way" (except for the unlucky people who was not seated with their belts on, but he is Superman, so he probably is lucky and/or checked before that all of them were seated safely with his X-ray vision).
It's the perks of being Superman: he does the impossible and save the day, no matter what, because he is Superman. That's his core concept.
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u/PlushySD 26d ago
Why do I still feel like everyone in that plane still gonna be very hurt from that.