Using the Instant Pot, add the kidney beans and enough water to cover them. Turn the knob to "sealing" and turn the timer to 25 minutes on high pressure. Turn the pressure cooker off when the timer is up, change the knob to "venting" and do a quick release. Drain and set aside.
Repeat with the chickpeas at 20 minutes. Drain and set aside.
Repeat with the lentils at 90 minutes. Drain and set aside.
The beans can be cooked a day ahead of time.