Carefully arrange individual slices of smoked salmon on one area of a large platter. Lift and "ruffle" the slices on the platter to make it easier for guests to pick up individual slices.
Arrange the tomatoes, radishes, avocado, cucumber, and red onions around the platter.
Place small bowls on the platter for the capers and pickled onions. You can also place little piles of the capers and pickled onions directly on the platter.
Place lemon slices, lemon wedges, chives, and dill around the platter.
Serve the platter with Herb Whipped Cream Cheese, almond milk cream cheese, toasted mini bagels, and Everything Bagel Chips for guests to assemble their own open-face or regular bagel sandwiches.
If you have leftovers, wrap components separately in plastic wrap or in tightly sealed storage containers and keep in refrigerator for about 2 days.