TikTok Shrimp Sushi Bake Cups

Name: TikTok Shrimp Sushi Bake Cups
Ingredients: cooking spray; 3 sheets nori (dry seaweed), quartered; 1.5 cups warm cooked sushi rice; 1 teaspoon seasoned rice vinegar; 0.333 cup Japanese mayonnaise (such as Kewpie®); 1 tablespoon Sriracha chile sauce; 1 tablespoon seasoned rice vinegar; 1 tablespoon soy sauce; 1 pound uncooked medium shrimp, peeled and deveined; 0.333 cup seasoned panko bread crumbs; 1 tablespoon canola oil; 0.5 tablespoon white sesame seeds, toasted; 0.5 tablespoon black sesame seeds; 2 tablespoons thinly sliced scallions; 0.5 avocado, finely chopped