Toast the coconut, 2 min: Warm a dry skillet over medium. Add shredded coconut; stir until deep golden and fragrant. Transfer 2 Tbsp to a small bowl for garnish; let the rest cool.
Blend the base, 2 min: In a blender, combine coconut milk, almond milk, sweetener, lime juice, zest, vanilla, salt, and ¾ of the toasted coconut. Blitz 20 seconds until smooth.
Fill the molds, 3 min: Divide mixture among 6–8 paleta molds. Sprinkle reserved toasted coconut on top. Insert sticks.
Freeze until solid, at least 4 hours, overnight best.
Serve & store: Enjoy immediately or keep wrapped in a freezer bag for up to 1 month.