Thinly slice the English cucumbers and sweet onions. Place cucumbers in a colander, sprinkle with salt, and let sit for about 10 minutes.

Rinse cucumbers under cold water and pat dry with a kitchen towel.

In a microwave-safe bowl, soften the whipped cream cheese by microwaving for 15 seconds. Whisk cream cheese, mayonnaise, soy sauce, rice vinegar, and sesame oil until smooth.

In a mixing bowl, combine drained cucumber slices and sliced onions. Drizzle half of the dressing over the vegetables and let sit for 5 minutes.

Add remaining dressing and mix-ins (if using). Toss gently until well coated.

Transfer the salad to a serving dish and garnish as desired.