Spray a 7-inch springform pan with nonstick cooking spray. Line the bottom and partway up the sides of the pan with foil.
Put the cream cheese in a large bowl. Use an electric mixer to whip the cream cheese until smooth, about 2 minutes. Add the erythritol, lime juice, vanilla, yogurt, and zest, and blend until smooth. Stop the mixer and scrape down the sides of the bowl with a rubber spatula. With the mixer on low speed, add the eggs, one at a time, blending until just mixed. (don't overbeat the eggs.)
Pour the mixture into the prepared pan. Draped a paper towel over the top of the the pan, not touching the cream cheese mixture, and tightly wrap the top of the pan in foil. (Your goal here is to keep out as much moisture as possible.)
Pour 1 cup of water into the electric pressure cooker.
Place the foil-covered pan onto the wire rack and carefully lower it into the pot.
Close and lock the lid of the pressure cooker. Set the valve to sealing.
Cook on high pressure for 35 minutes.
When the cooking is complete, hit Cancel. Allow the pressure to release naturally for 20 minutes, then quick release any remaining pressure.
One the pin drops, unlock and remove the lid.
Using the handles of the wire rack, carefully transfer the pan to a cooling rack. Cool to room temperature, then refrigerate for at least 3 hours.
When ready to serve, run a thin rubber spatula around the rim of the cheesecake to loosen it, then remove the ring.
Slice into wedges and serve with whipped cream (if using).