Square Enix has released a Demo version of Dragon Quest Builders 2 called "Jumbo Demo" for Sony PlayStation 4 through the PlayStation Store and Nintendo Switch through Nintendo eShop. (The current demo only exists in some countries, but will be released to everyone after today.)
Here is an overview of the demo, via Square Enix:
Explore the world of Dragon Quest Builders 2 with Jumbo Demo.
Start by customizing your character and start your first encounter with the kids of Hargon. Explore the Isle of Awakening and move to Furrowfield to help the villagers rebuild their town! When playing this demo version, players can transfer their saved data to the full version of Dragon Quest Builders 2!
Dragon Quest Builders 2 has now been released worldwide for Sony PlayStation 4 and Nintendo Switch.
Trailer launch for Switch:
