Your sedum has rasping feeding damage from an insect or slugs. There is no sign in the photos to determine exactly. If it is insects, they are gone. If it is slugs, you may be able to catch them in the act at night.
Cut back the damage. If it recurs, that does suggest that it is from slugs. Here is our page with slug control help: https://extension.umd.edu/hgic/topics/slugs-and-snails-flowers