You said “church.”
Many - not all - of the temples do include a statue of Moroni. He’s the angel that we believe visited and gave the Book of Mormon to Joseph Smith for translation. As such, he’s become a symbol of the restoration of the Gospel. You’ll notice he’s holding a trumpet. That’s a Biblical symbol.
We do not worship Moroni. Calling such statues “idols,” etc. is inaccurate.