Add chickpeas to the Instant Pot and cover with 3 cups of vegetable stock. Place, lock, and seal the lid. Press "Manual" (high pressure) and adjust to 35 minutes. Once the timer goes off, allow the pressure to release naturally.
Once cooked, strain the chickpeas through a colander with a bowl underneath to reserve the cooking liquid. Add the cooked chickpeas to a food processor and add the olive oil, tahini, lemon juice, garlic, cumin, salt, cayenne, and reserved cooking liquid. Process into a thick puree, adding in water as needed to create the desired consistency.
If you're not planning to serve immediately, I recommended making it a little thinner as it will firm up when stored. Store in a quart sized mason jar for up to week.