This is because it seems that the game has since been delayed and will only launch in 2019. In a statement made to Game Informer, they company said, “We can confirm this game will be released in 2019.” This was the same thing that was told to Polygon where Nintendo of America President Reggie Fils-Aime said that the game “continues to be in development making great progress.”
It is unclear as to what might have caused the game to be delayed, but it is a pity considering that it showed a lot of promise based on the videos that we’ve seen. However it is possible that the delay could be attributed to the various launches that Nintendo has on its plate for 2018, and that maybe launching Yoshi this year could end up being a bit too much.
Either way for those who were looking forward to trying it out, we guess you’ll have to wait until 2019 before you can get your hands on it. When exactly in 2019 is anyone’s guess but maybe Nintendo will have more details to share at a later date.