JJ - Destroyer of Worlds

To get things back on track, here is a complete list of all the moments in the film when a reference is made to the Final Order having Death Star cannons:

(I think we can imply that the function of those cannons is just, big guns, not blowing up planets!)

Hux saying, “Shall we destroy the city?”
Palpatine telling Pryde to destroy a world they know. (So dumb!)
Scene of Kijimi’s destruction.
The aftermath scene with Poe, Rose and Merry.
Poe saying, “Every one we knock out is a world saved!”

As you can see, there is not many, so it should be pretty straightforward!