Everything Flatbread with Smoked Salmon

Name: Everything Flatbread with Smoked Salmon
Cook time: 25 min
Total time: 25 min
Cuisine: American, Middle Eastern, Asian
Ingredients: All-purpose flour, for dusting; 16 oz. pizza dough (thawed if frozen), at room temperature; 1 tbsp. plus 1 teaspoon olive oil, divided; 1 tbsp. everything bagel seasoning; 8 oz. cream cheese, at room temperature; 2 tbsp. thinly sliced chives; 2 tbsp. chopped dill fronds; 1 tsp. lemon zest; 6 oz. grape tomatoes, sliced; 1/2 small red onion, thinly sliced; 1 tbsp. capers, chopped; Kosher salt and pepper; 4 oz. smoked salmon; 1 Persian cucumber, thinly sliced lengthwise