Heat oil in the instant pot on the "Saute" function. Add chicken (frozen chicken is fine). Cook for 5 minutes to brown the chicken just a little. (Sometimes I skip this step and it's still amazing.)
Add the ginger, garlic, spices, lemon juice, tomato sauce, and 1 cup water (plus a bouillon cube) or 1 cup chicken broth. Stir a little bit. (Imperfection is encouraged.)
Cook on "Manual" as follows: Frozen chicken breasts - 15-20 minutes; frozen tenderloins - 10 minutes; thawed chicken breasts - 10 minutes; thawed tenderloins - 8 minutes.
When the instant pot beeps, use manual pressure release. Immediately check the doneness of the chicken. If it needs more time, fix the sealing ring on your pot lid, replace the lid, and cook on "Manual" for another 3-5 minutes.
Add the whipping cream and stir to combine. If desired, you may cut the chicken into smaller pieces before serving. It will be very tender.
Serve over rice with peas and naan. Pass with cilantro and additional cayenne pepper, if desired.