The cat's still in the bag
Developer/Publisher Colopl announced Shironeko New Project for Switch all the way back in 2018, and the original plan was to release this action RPG sometime in 2020. Obviously, the game ended up delayed multiple times after that date, but here we are all the way in 2023 with no idea what’s going on. Unfortunately, it seems things are going to stay that way.
During a shareholder question and answer session, Colopl was asked about the status of Shironeko New Project for Switch. Colopl did respond to the question, but with a non-answer. You can see their exact response to the question below.
As for the development of the Switch version, we have no news to be able to announce at this time, we would like to inform you again when we are in the situation to be able to do so.