What needs to be unlocked is the subsequent content in the game. Some subsequent contents in the game need to complete certain tasks or meet certain conditions before they can be unlocked. You can check the task list or achievement list of the game to see if you need to complete a task or meet a certain condition.

Fitness Ring is a game developed and distributed by Nintendo, a Japanese game company, which is specially designed for Nintendo Switch platform. Nintendo is a world-renowned game and entertainment company, founded in 1889 and headquartered in Kyoto, Japan.