Spray a 7″ springform pan with baking spray.
Set aside.
To make the custard, whisk together eggs, pumpkin puree, whipping cream, sugars, cinnamon, and vanilla in a large bowl.
Tear the French Bread into small bite-sized pieces and place in bowl.
Toss the bread into the custard mix.
Arrange the bread in the prepared springform pan.
Carefully pour the remaining custard over the bread in the pan.
Place aluminum foil on top of it.
Add 1 cup water to the Instant Pot.
Place the trivet with the prepared cake pan on top of it, into the Instant Pot..
Close the lid with the pressure valve to sealing.
Set to cook on manual high for 22 minutes.
Open after 10 minutes by Natural Pressure Release.