In a large bowl, mash the rinsed chickpeas with a fork until they are mostly broken down but still have some chunky texture.
Add the ground turkey, chopped fresh parsley, ground cumin, garlic powder, sea salt, and black pepper to the bowl with the chickpeas.
Mix the ingredients by hand until just combined, being careful not to overwork the meat, and form into four thick patties.
Heat the avocado oil in a large non-stick skillet over medium-high heat until shimmering.
Place the patties in the skillet and sear for 5 to 6 minutes per side until a golden-brown crust forms and the turkey is fully cooked through.
While the falafel is cooking, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until the sauce is creamy and smooth.
Plate the crispy falafel patties and drizzle generously with the lemon-tahini sauce before serving.