Line a baking sheet with parchment paper. Peel the bananas and slice them in half crosswise. Stick a popsicle stick through the thicker end of each banana and push it halfway through. Arrange the bananas in a single layer on the baking sheet and freeze for at least 2 hours.
Meanwhile, make the chocolate coating. Pour the chocolate pieces and coconut oil into a glass bowl and microwave in 30-second intervals until melted. Alternatively, you can melt the chocolate chunks using a double boiler. Pour the chocolate coating into a small bowl and set aside.
Set a square of parchment paper on the board. Put the peanut butter, pistachios, almonds, vegan sprinkles, freeze-dried strawberries, shredded coconut, crushed potato chips and crushed pretzels in bowls of similar size. Pour the flaky sea salt into a mini bowl. Set all of the toppings around the perimeter of the board.
Place the bowl of chocolate sauce in the middle and set the frozen banana pops on either side.
Have your guests combine their chosen toppings in a small bowl before selecting their banana pop; each banana pop holds about 2 tablespoons (16g) of toppings.
The chocolate coating will harden very quickly when it comes into contact with the frozen banana. Allow everyone to dip their bananas in the chocolate coating and quickly sprinkle with their selected toppings.