In out household we limit gaming to 30 minute blocks but when we are playing Mega Man 11 on the Switch there is no auto save, so if we just turn off the game we lose all progress.
How can I stop playing, save my progress, and quit Mega Man 11 on the Switch?
The save options can be found in the main boss menu, and the option appears after completing a stage or hitting the game over screen
so you should be able to manually save after completing the stage.