UPDATE 15/06/21: The Life is Strange Remastered Collection and Life is Strange: True Colors are both due to release on Switch this year, it was announced during today's Nintendo Direct.
Life is Strange: True Colors will be available on 10th September, while a release date for the Remastered Collection on Switch has not yet been confirmed - but we do know it will arrive "later this year".
ORIGINAL STORY 13/06/21: The remastered versions of the original Life is Strange and its prequel Life is Strange: Before the Storm now have a release date of 30th September.