Spray a 7 inch Springform pan with cooking spray and set aside.
In a medium bowl, combine the graham cracker crumbs with butter and sugar.
Press crumbs into the bottom of your greased springform pan using a fork and place pan in freezer for about 10 minutes.
In a separate bowl, combine the cream cheese and sweetened condensed milk until combined.
Add in the lime juice, egg, and zest making sure not to overmix.
Pour batter onto frozen crust and spread evenly.
Place one cup water into the bottom of your Instant Pot liner and place trivet (the one that came with it) on bottom.
Create a sling using tin foil (or see link above for silicone one) and place pan on top.
Lower the pan carefully on top of the trivet.
Place lid on Instant Pot and ensure valve is in sealing position.
Select manual/high pressure for 25 minutes followed by a 10 minute natural pressure release.
After 10 minute natural pressure release, do a quick pressure release and allow pin to drop.
Open lid and carefully blot top of cheesecake with paper towel to absorb any excess moisture.
Lift sling out of Instant Pot and place on flat surface to cool.
Once the cheesecake has cooled, cover top with plastic wrap and place into refrigerator for a minimum of 4 hours.
When ready to enjoy, combine the heavy whipping cream, powdered sugar, and vanilla in a bowl. Beat with a mixer until stiff peaks form.
Dollop or pipe whip cream on top in desired pattern and serve! Enjoy!