It looks like PC will receive Dragon Quest Builders 2 in December.
In a report by Eurogamer, all the season pass DLC will be included when the game launches on PC on December 10.
Releasing on Steam, it’ll be priced at $60 which includes all previous DLC from within the Season Pass on console. This includes Hotto Stuff Pack, Modernist Pack, Aquarium Pack, Designer's Sunglasses, Legendary Builder Outfit, and Dragonlord's Throne.
If you buy the game before January 6 next year, you’ll also receive a Medicinal Herb Decoration recipe, Dragon Quest Logo Decoration recipe, Chimaera Wing Decoration recipe, Sigil Blocks recipes, Lo-Res Luminary recipes, and the Legendary Line Art recipe.