Hard-boil eggs, then transfer to an ice bath.
Peel and slice in half lengthwise.
Remove the yolks and transfer them to a bowl.
Add mayonnaise, cream cheese, Dijon mustard, lemon juice, garlic powder, and a pinch of salt and black pepper.
Mash until smooth. Adjust seasoning to taste.
Spoon or pipe the yolk mixture into the egg whites.
Sprinkle each deviled egg with everything bagel seasoning.
Serve immediately or chill before serving.