In a medium bowl, beat cream cheese until smooth and creamy.
Add sugar and vanilla extract, and mix until combined.
Add the egg and mix just until incorporated. Do not overmix.
Pour the filling over the prepared crust and smooth the top.
Pour 1 cup of water into the Instant Pot. Place a trivet inside.
Cover the cheesecake pan tightly with foil and place it on the trivet.
Lock the lid, set the valve to SEALING, and cook on high pressure for 22 minutes.
Let the pressure release naturally for 15 minutes, then manually release remaining pressure.
Remove the pan and let the cheesecake cool to room temperature. Refrigerate for at least 4 hours or overnight.