Place lemon juice, simple syrup, and 1/2 of the thyme in a stainless-steel shaker and muddle.
Add whiskey, ginger lacquer, and egg whites with ice. Shake vigorously and strain into a chilled cocktail glass. Tap glass bottom to disperse air bubbles.
Top with sour and garnish with 4 drops orange bitters, lemon wedge, and the rest of the thyme.