Set your Instant Pot to the saute setting. Add 1/2 cup of Italian salad dressing. and Chicken thighs. Saute chicken thighs for 1 minute on each side. Don't cook them all the way through, just brown them.
Add 1/2 cup of Italian dressing once the thighs are browned Hit cancel to stop the heat.
Place the vegetable steamer on top of the chicken. Place the potatoes and the carrots in the vegetable steamer.
Close and lock the Instant Pot lid. Set the valve to "sealing"
Cook on high pressure for 15 minutes. Quick Release Pressure.
Remove potatoes, carrots, and chicken, from the pot and arrange them on a serving dish. discard cooking juices.
If you want your potatoes to be crispy. Hit the saute button, and cook the potatoes with 1/4 cup of Italian dressing until they get browned. Glaze additional Italian dressing over the chicken if you desire. Serve