AJO Provider Error in iOS TestFlight App

Hi, I was experiencing an issue getting everything to work, and it was only resolved after adding
MobileCore.updateConfiguration({ 'messaging.useSandbox': true }).

However, after submitting my app to TestFlight with this value set to true, I started receiving a Provider Error when sending push notifications to the audience.

My question is: If I set this variable to false, will push notifications work correctly in the TestFlight build?