Last I heard, nothing generated by an LLM can be copyrighted. Copyright is for protecting the intellectual work of humans, not computers.
The closest I've heard is a LLM generated book had portions of the book copyrighted by the "Author", but only the portions where the author had significantly altered the LLM generated text.
The closest I've heard is a LLM generated book had portions of the book copyrighted by the "Author", but only the portions where the author had significantly altered the LLM generated text.