Season pork chops with salt and pepper, set aside.
Turn Instant Pot to Sauté setting, add olive oil and sauté onions in olive oil until soft, about 3-5 minutes. Add garlic, toss, and cook one more minute. Add apple slices and cinnamon, toss and sauté for an additional 2 minutes. Pour in chicken broth, season with salt and pepper, stir, and let sauté one more minute.
Add in pork chops, put on lid, and turn to Manual setting (on high pressure) for 3 minutes. Make sure valve seal on lid is in the “Sealed” position. After Manual cycle completes 3 minutes, let cook for 8 minutes, then flip the valve seal on the lis is flipped to “Release” to release remaining pressure. This will prevent the pork chops from overcooking. Chops should be done through, or insert a meat thermometer to make sure it’s 145-160 degrees. Serve immediately, topped with onion and apple mixture.
If cooking in slow cooker:
Heat up oil in sauté pan to medium high, sauté onions in olive oil until soft, about 3-5 minutes. Add garlic, toss, and cook one more minute. Add apple slices and cinnamon, toss and sauté for an additional 2 minutes. Pour in chicken broth, season with salt and pepper, stir, and let sauté one more minute.
Pour entire mixture into slow cooker and add in pork chops. Cover and cook on high for 3-4 hours. Serve topped with onion and apple mixture.