In a medium bowl, whisk together 1/2 teaspoon kosher salt, 1/2 teaspoon ground cumin, black pepper to taste, 1 tablespoon chipotle paste, and 1 cup mild salsa until combined.
Place the chicken thighs in the Instant Pot and pour the salsa-chipotle mixture over them, coating evenly.
Close the lid and cook on high pressure for 20 minutes. Perform a quick release or natural release per your preference, then open the lid.
After the initial cook, add the husked corn to the pot, close the lid, and cook on high pressure for 2 minutes; then quick release pressure. Remove the corn and set aside.
Meanwhile, bring the quinoa, 1 cup plus 2 tablespoons water, and 1/4 teaspoon kosher salt to a boil in a saucepan over high heat.
Once boiling, reduce heat to low, cover, and simmer until the liquid is absorbed, about 18–22 minutes. Fluff with a fork, then stir in the juice of 1 lime, 1/2 tablespoon olive oil, and 2 tablespoons chopped cilantro.
Remove the cooked chicken from the Instant Pot, shred with two forks, and stir in about 1/2 cup of the cooking sauce from the pot.
Cut the kernels off the cooked corn cobs using a knife.
Assemble bowls: divide 2/3 cup cilantro-lime quinoa among bowls, top each with 1/2 cup shredded chicken (plus extra sauce if desired), about 1/3 cup corn, 1/4 cup halved cherry tomatoes, and 1 ounce sliced avocado.
Garnish with the remaining chopped cilantro and serve with lime wedges.