I imagine there's a good chance that the plane could fly after this, but aviation is (rightfully) risk averse and expect it'll have a pass a full inspection before being cleared for flight again.

There is zero chance they're flying immediately after this.

Depends on how much of the wing has buckled.

If it's just a wingtip Boeing sends a AOG (Airplane On Ground) team to repair it onsite. They remove the wing skin replace any ribs, spars, wiring, lighting, etc, that are damaged, before riveting a new skin over it.