Why is Beethoven’s Appassionata Piano Sonata notable for its coda?

Ludwig van Beethoven’s Piano Sonata No. 23 in F Minor (1804–05), commonly known as the Appassionata, is notable for its coda because of its significant scale and function. While a coda typically serves as a brief concluding section to a sonata movement, Beethoven often expanded this section to such an extent that it functioned almost as a second development section.1

In the context of sonata form, this approach allowed him to further explore and transform thematic material even after the recapitulation had concluded, providing a more profound resolution to the movement's musical drama.12