Using the Sauté function on High, heat 1 tablespoon oil in the inner pot for about 1 minute, until shimmering. Add the peanuts and cook for 1 minute, stirring frequently, until fragrant. Add the chilies, cumin seeds, coriander seeds and curry leaves; cook for 1 minute, until fragrant. Transfer the nuts and spices to a blender and let cool slightly. Remove 1/4 cup of the peanut mixture and set aside until step 4. Add 1 teaspoon salt and the tamarind concentrate to the blender; blend on high speed until smooth, adding 1 tablespoon water if needed to help the mixture blend.
Using the Sauté function on High, heat 2 tablespoons oil in the inner pot for about 1 minute, until shimmering. Add the onions and cook for about 4 minutes, stirring occasionally, until softened. Add the ginger and garlic; cook for about 1 minute, until fragrant.
Stir in the chicken, 1/2 cup water, peanut chutney and remaining 1 teaspoon salt. Secure the lid and cook on high pressure for 8 minutes.
Once the cooking is complete, let the pressure release naturally for 10 minutes, then quick-release the remaining pressure. Transfer the curry to a platter. Pour the reserved peanuts and spices over the chicken and serve.