In a small mixing bowl, combine the Kewpie mayonnaise, rice vinegar, hot sauce, sriracha, or sweet chili sauce, grated or crushed garlic, light soy sauce, sugar, ketchup, and coarse sea salt.
Whisk until the sauce is smooth and fully combined.
If using coconut aminos instead of soy sauce, omit the sugar from the sauce.
Taste and adjust the sauce as desired.
Remove the Salmon
Once the salmon is cooked, open the air fryer basket and allow the salmon to rest for approximately 10 seconds.
Carefully remove the salmon cubes from the basket using a thin spatula or suitable utensil.
Transfer the salmon bites to a serving plate, taking care not to break them apart.