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It isn’t an avenger . . .

You say that with great confidence, but I'm not so sure. It's clearly not upside, down. The flaps are down and you can clearly see the wing-root fairing that they would fair into. It's also not an SBD (Dauntless) because that was a low-wing design and the wings in the photo attach nearly at the top of the remaining fuselage. The rules out most of the other tactical aircraft from both the US and Japanese navies as well (e.g. Zero, Kate, Val) plus most of the floatplane options.

If you took the canopy off a TBM (Avenger) which is shoulder-winged, then the wing would look like it came from near the top of the fuselage. Further, there is a circular set of structural members about where the wheel well is on an Avenger. One final possible identifying point is that there is no visible wing fold partway out on the wing. Since the wings on the Avenger folded at the root, it would not show a double-rib, etc.

None of that is proof, but I think that it is likely to be an Avenger.

Looking at the flaps, they appear to be perforated like those of an SBD. If so, the wreckage isn’t inverted as the story claims or wheel wells would be prominent. Also in the rear of the cockpit area, what looks like the gunner’s seat is visible (rotated forward).