Make the sauce by mixing Sriracha, ketchup, mayo, Greek yogurt, allulose, and minced garlic.
Soak frozen shrimp in water to thaw them. (After thawing, cover and microwave for 4-5 minutes.) Toss the cooked shrimp in the sauce (reserve some sauce).
Slice the bagel in half and spread basil pesto on both sides (mix with remaining sauce before spreading).
Place one half of the bagel on a plate, then layer lettuce, sandwich ham, and sliced tomatoes (seasoned with a little salt and pepper).
Add the sauce-coated shrimp on top.
Add cheddar cheese and scrambled eggs.
Place the other half of the bread on top and wrap the sandwich tightly in plastic wrap.