Heat a large pot or Dutch oven over medium heat. Add the bacon and cook, stirring occasionally, until bacon is just crispy, about 6 minutes. Using a slotted spoon, transfer cooked bacon to a paper towel-lined plate and set aside. Reserve the bacon fat in the the pot.
Add the sausage, onions, garlic, salt, and pepper. Cook, breaking up meat with back of spoon, until cooked through and no longer pink, 4 to 5 minutes.
Add the arrowroot flour and stir until well incorporated. Stirring constantly, slowly pour in chicken broth, then bring the soup to a boil.
Reduce heat to simmer. Add the Italian seasoning, chopped kale, and potatoes. Cover and cook until the potatoes are tender, 10 to 15 minutes.
When the potatoes are tender, uncover and stir in the creamer, nutritional yeast, and lemon juice. Cook for 5 minutes, simmering uncovered, just to let the flavors meld.
Garnish with the cooked bacon bits, serve, and enjoy!