During the Credits
There is a scene with ballet dancers dancing to the Nutcracker right before the credits of The Nutcracker and the Four Realms.
There are also extra animations of characters from the film while music plays during the credits.
After the Credits
There is no stinger after the credits of The Nutcracker and the Four Realms.
Special thanks to Katie, circuitrider, Hayley Schaff, and Bryan Woods for the stinger submissions!