Season the turkey breast with salt.
Combine the softened butter, minced garlic, sage, rosemary, thyme, paprika, and parsley. You can also melt the butter before mixing in the seasonings, and then brush it on the turkey breast.
Generously rub the turkey breast with the herbed butter. You can do this the day before. Let it marinate in the fridge until ready to use.
In a 6- or 8-quart Instant Pot, press the saute function. Once hot, add oil and saute the chopped onion and celery.
Pour in the chicken stock and stir, making sure to scrape the bottom of the pot to remove any stuck pieces.
Place the turkey breast inside on the trivet and close the lid with the vent set to sealing.
Cook on manual high pressure for 20-35 minutes (6 minutes per pound) until an instant-read thermometer inserted into the thickest part of the turkey reads 165℉ (74℃). The Instant Pot usually takes about 10 minutes to come up to pressure, and the timer starts after this.
When your cooking time is done, release the pressure naturally for 15 minutes, then turn the knob to vent to release any remaining pressure.
Optional: If you want the turkey to look like in the photos, low broil it for 1-2 minutes. But don't take your eyes off it because it burns easily.
Let the turkey breast sit for 10 minutes before carving so the juices settle back into the meat.
Optional: If you want the turkey to look like in the photos, low broil it for 1-2 minutes. Do not take your eyes off it because it burns easily.