I’m not sure it constitutes “smashed to bits”, but it’s a shame after all that work.
Yes, it can be rebuilt. Anything can, especially low-tech aircraft such as that.
Nothing…except possibly the engine…is made of “unobtainium”. (I was a volunteer on the airworthy rebuild of a similar tech aircraft….so I think I can safely give an opinion).
And being a WWI ship, it’s likely all the major bits were new anyway.
Glad everyone is safe, that’s the main thing.