I'm pretty sure it is Todea. Compare it with my post-fire sighting of that species: https://atlasoflife.naturemapr.org/Sightings/4263916 If you right click on the image and go "open in new tab" it downloads the photo to your computer and you can zoom in for a closer look. The big trunk with numerous small stems arising from it looks just like my Todea shots, but the photo is too distant to be able to see well that the fronds are bipinnate. Way too big for any Blechnum I know.
Yes, that did cross my mind too, with the fat trunks, but I've not seen T. barbara when it's growing back after a fire. I couldn't tell the scale from the photo, and B. nudum can form trunks. I agree with the ID.
Unfortunately I have lost some other images from this site that might have shown it better, but I have edited the sighting to include a cropped image of the original if that helps
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