"Mystic Christmas" was actually shot in Mystic, Connecticut (2023) and used real locations and real businesses.
William R. Moses stars in Mystic Pizza (1988), which also takes place in Mystic, Connecticut. Both movies have a pizza parlor as a featured locale.
The scene in which Juniper is seen exiting the train station was shot at the entrance and information center for the Mystic Seaport Museum. There is in fact no passenger train in Mystic.
The building used for the exterior shot of the train station is the same building used for the interior shot of the town hall scenes. This building is the entrance and visitors center for the Mystic Seaport Museum.