At jet speeds, you don't need a man-made object to explain a huge hole. Here's an example of a bird strike in a 737: https://www.stuff.co.nz/travel/travel-troubles/97238940/mass...
https://aviation.stackexchange.com/questions/23420/how-many-...
Boeing 737 Passenger Jet Damaged in Midair UFO Collision
Clickbait. If it's being talked about here, that article has likely (or likely will be) shared all over social media.
If a bird hit anywhere else on the plane the cross sectional area of the impact zone would be fairly small in comparison to the nose cone, and probably a fair bit stronger, so we could probably expect to see less damage on a wing or tail fin as at 700 odd kilometers per hour the bird would probably be cut in two by the leading edge of a wing or tail fin?
I'm not aircraft engineer, though.