I noticed the IL rules include this part: “For the Switch version, you MUST turn off checkpoints when running individual levels. In older versions, the checkpoints do not heal you, so Switch players have to turn them off so they don't have an advantage.”

I’m playing on 3DS, but on the physical cart of the Atooi Collection, and it looks like checkpoints heal you in this version of the game as well, so this may need to be added to the rules.