01 - Combine frozen pineapple chunks, frozen mango chunks, ripe banana, coconut milk, and fresh lime juice in a blender. Blend on high speed until completely smooth and creamy, approximately 1-2 minutes.
02 - Divide the blended tropical mixture evenly between two tall glasses, filling each approximately one-third full to leave room for soda and ice cream.
03 - Slowly pour 1 cup of chilled lemon-lime soda into each glass, pouring down the side to minimize foam and preserve the layered effect.
04 - Place one generous scoop of vegan vanilla ice cream on top of each float, allowing it to rest on the surface.
05 - Decorate with fresh mint leaves, pineapple wedges, and toasted coconut flakes. Serve immediately with straws and long spoons for optimal enjoyment.