The Leafs are going to lose someone to Las Vegas in a few weeks.
As Katya has laid out, the expansion draft allows teams to either protect seven forwards, three defenders, and one goalie, or eight skaters and one goalie. Many key Leaf players are exempt from the draft altogether (including Auston Matthews, William Nylander, Mitch Marner, Zach Hyman, Kasperi Kapanen, Nikita Soshnikov, and Nikita Zaitsev). The Leafs must also expose a certain number of players who meet games-played requirements, but they shouldn’t have much trouble doing this.