It'll be a few weeks for the adventure.
http://www.nintendoworldreport.com/news/58072/life-is-strange-true-colors-switch-version-delayed-still-targeting-2021
The Life is Strange Remastered Collection is not alone in being delayed, but True Colors has a target.
A response posted following Wednesday's announcement from the Life is Strange brand Twitter confirmed that the Switch version is "running a little late" and will miss the planned September 10 launch date. It is still planned for 2021.
DLC for the other platforms has been announced for launch on September 30; it has not been announced if that content will be available day and date with the base game on Switch (assuming the release is after that).