Cut away most of the stalk from each collard green leaf.
Wash each leaf thoroughly at least twice to remove all grit.
Stack the leaves, roll them tightly like a cigar, and slice across thinly to shred. Wash the shredded greens one more time.
Set the Instant Pot to the high sauté setting. Add the bacon and cook until almost crispy, breaking it up as it cooks.
Add the onion, apple cider vinegar, and red pepper flakes. Cook for about 3 minutes, stirring occasionally, until the onion begins to soften.
Add the smoked turkey wing, chicken broth, salt, black pepper, and collard greens to the pot. Pack the greens in tightly if needed.
Lock the lid and cook at high pressure for 60 minutes.
When the cook time is complete, allow the pressure to release naturally for 15 to 20 minutes.
Open the lid and remove the smoked turkey wing. Discard the skin and bones, then return the meat to the pot. Stir well, taste for seasoning, and serve.