Combine the hot sauce, sriracha, olive oil, and vinegar (if using) in a medium bowl. Add the chickpeas, tossing to coat them in the sauce, and set aside. In another medium bowl, combine half the celery ranch sauce with the celery. In a third medium bowl, thin the other half of the celery ranch sauce with water if needed.
Heat the safflower oil in a large skillet over medium-high heat. Add the green bell pepper, red bell pepper, and ¼ teaspoon of the salt. Cook the bell peppers until they are golden on some sides, 4 to 5 minutes, stirring occasionally. Warm the tortillas if desired.
Add some of the baby spinach, roasted bell peppers, and celery to every taco. Divide the remaining ¼ teaspoon salt between all the tacos. Add some Buffalo chickpeas and a generous drizzle of the celery ranch sauce to each taco and serve.