Combine vegan heavy cream, oat milk, and toasted coconut syrup in a small cup or bowl.
Use a handheld frother or milk frother (like a Ninja frother) to whip the mixture until light and airy, about 30–45 seconds.
In a tall glass, combine cold brew coffee and 1 tablespoon toasted coconut syrup. Add ice to fill the glass.
Gently spoon or pour the toasted coconut cold foam over the top of the cold brew.
Optional: sprinkle toasted coconut chips on top for garnish.