Rinse the dry black beans thoroughly in a colander and set aside.
Set the Instant Pot to Sauté and heat the avocado oil until shimmering.
Add the diced onion, minced garlic, and chopped jalapeño (if using). Sauté, stirring occasionally, until the onion is translucent, about 3 minutes.
Cancel Sauté. Add the rinsed black beans, 7 cups water or chicken broth, chili powder, and dried parsley to the pot. Stir to combine.
Secure the Instant Pot lid and set the valve to sealing. Select Manual/Pressure Cook on high and cook for 35 minutes.
When the cook time finishes, allow the pressure to release naturally for 20 minutes, then carefully quick-release any remaining pressure and open the lid.
Stir in lime juice and sea salt to taste, then adjust seasonings as desired before serving.