Preheat the air fryer to 350°F (175°C).
Pat the salmon dry with paper towels and season both sides evenly with the lemon pepper seasoning.
Place the salmon pieces in a single layer in the air fryer basket without overcrowding; work in batches if necessary.
Cook the salmon at 350°F for 12 minutes; do not flip during cooking.
While the salmon cooks, melt the butter in a small skillet over medium heat.
Add the sliced almonds to the melted butter and cook, stirring frequently, until the almonds are golden brown, about 3 minutes; remove from heat to prevent burning.
When the salmon is done, transfer to a serving plate and drizzle with the lemon juice.
Sprinkle the browned almonds and chopped green onions over the salmon, then serve immediately.
