Preheat your oven to 400°F and line a large baking sheet with parchment paper to prevent sticking.
Drain and rinse the canned chickpeas thoroughly, then pat them dry with a paper towel.
In a food processor, combine the chickpeas, liquid egg whites, hemp seeds, nutritional yeast, pea protein powder, parsley, cilantro, sea salt, black pepper, cumin, and garlic powder.
Pulse the mixture until it is well combined but still retains some texture; avoid over-processing into a smooth paste.
Form the mixture into 6 equal-sized patties and place them on the prepared baking sheet.
Bake for 18 to 20 minutes, flipping once at the halfway mark, until the falafel is firm and the edges are golden brown.
While the falafel bakes, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until the sauce is smooth and creamy.
Remove the falafel from the oven and serve immediately with the zesty tahini sauce drizzled over the top.