Cut your Smithfield Prime pork center cut pork loin in 4 equal pieces. Rub your seasoning salt and salt free seasoning on all pieces - top and bottom.
Turn pressure cooker to saute, low and add olive oil. When hot put pork pieces in and sear both sides, remove when all 4 pieces are done and turn pot to OFF/Cancel.
Pour 1 cup of your vegetable broth into your Instant Pot and use a wooden spoon to scrape bits of seasoning and pork bits off bottom of pot. (called deglazing, link to how to do this above recipe card if needed)
Leave broth in pot and put your 4 pork pieces back in. Pour remaining cup of broth into your pot with your diced onions.
Close lid and steam valve and set to pressure high for 60 minutes. Allow to naturally release pressure for 5 minutes, then do a quick release when done. Turn pot OFF/Cancel.
Take 1 piece out at a time and in a separate bowl shred your pork and remove fat (if desired).
Dump contents of pot out into a strainer to keep the cooked onions. Put onions back into your pressure cooker pot.
Add shredded pork back into your pot with your onions.
Mix together all other ingredients listed above (from ketchup down) well in a bowl (except pineapple tidbits) and pour on your pulled pork inside your pressure cooker.
Gently mix so pork is coated.
Add in your pineapple tidbits and gently mix in.
Serve on slider buns topped with our homemade cole slaw or if you want it a bit warmer set to saute low again, stir gently as it is warming and then turn pot off and serve.