Mix crust ingredients; press into a greased 7-inch springform pan, going 1 inch up the sides. Freeze 15 minutes.
Beat cream cheese until smooth. Add sugar, sour cream, flour, lemon juice, vanilla — mix on low just until combined.
Add eggs one at a time on lowest speed.
Pour filling over crust; tap to remove bubbles; cover loosely with foil.
Pour 1½ cups water into Instant Pot. Place pan on trivet using a foil sling.
Pressure cook on HIGH for 25 minutes. Natural release 15 minutes.
Blot any condensation. Cool 1 hour at room temp, then chill at least 8 hours.
Wipe inner pot. Sauté half the strawberries with sugar, lemon, vanilla for 8–10 min. Add cornstarch slurry and the rest of the berries. Cool.
Top the chilled cheesecake with strawberry sauce. Slice and serve.