For the dill yogurt sauce, combine the greek yogurt, dill, lemon zest, lemon juice, and granulated garlic in a mixing bowl. Stir until smooth. Season with salt and black pepper to taste. Let sit at room temperature while you make the fritters.
Add the eggs, smoked paprika, granulated garlic, cayenne, and salt to a large mixing bowl. Whisk to combine. Fold in the grated sweet potatoes and green onions. Sprinkle in the flour and baking powder. Fold to combine.
Heat a 12” stainless steel skillet over medium heat. Add enough oil to generously coat the bottom. Once hot (the oil will shimmer), spoon about 2 tablespoons of the sweet potato mixture into the skillet at a time, using a spoon to flatten each fritter (you should be able to fit about 4-5 fritters in the skillet at once).
Cook for 2-3 minutes per side until golden crisp and cooked through. Adjust the heat throughout the cooking process as needed (medium-low if they’re getting too dark / back to medium when they’re not crisping enough).
Transfer the fritters to a sheet pan lined with a rack to drain. Immediately sprinkle with flaky sea salt. Repeat with the remaining mixture, adding more oil to the skillet as needed.
Serve the sweet potato fritters immediately with the dill yogurt sauce on top or alongside.