Add 2 swirls of oil to a pot on medium heat. Sauté the onion for 5-7 minutes until fragrant. Season with a pinch of kosher salt.
Pour the chicken broth into the pot.
Add the chicken and jerk seasoning and mix together until the chicken are fully coated in seasoning and submerged as much as possible.
Pressure cook on high for 20 minutes.
Make the pineapple salsa by combining all of the ingredients and mixing. Adjust seasoning to taste.
Release the pressure, then shred the chicken using 2 forks. Allow the shredded chicken to sit in the liquid for at least 10 minutes to absorb more flavor.
Build the tacos by spreading guacamole first, then adding chicken on top. Top with pineapple salsa and radish slices.