They call it a Skyteam Bonus.
https://www.koreanair.com/global/en/...onditions.html
And their rules say this below. So it seems that you're gonnah have to make a Skypass account for your infant and family pool the miles and then get a Skyteam flight award ticket that way. Just my interpretation, I have no experience.
Child and Infant
- The same bonus chart applies to infants occupying a seat and children.
- Infant is not eligible for SkyTeam Bonus even when not occupying a seat. Please purchase a paid ticket when a passenger is infant.