Put the white chocolate and coconut oil in a microwave-safe bowl.
Microwave in 20-second intervals, stirring after each, until the white chocolate is fully melted and the mixture is smooth.
Stir in the vanilla extract, almond extract (if using), and salt.
Let the mixture cool for about 5-10 minutes, until it's pourable but no longer hot.
Stir the rainbow sprinkles in right before using.
Pour the Funfetti Magic Shell over very cold ice cream and top with extra sprinkles immediately, before the shell sets.
Let sit for about 30 seconds, or until the topping hardens.