Entitlements file confer specific capabilities or security permissions to your iOS or macOS app.
Normally the entitlements file is created automatically (if necessary) based on your XCode settings. The entitlements file is generated using the ProjectCapabilityManager. Due to know issues with ProjectCapabilityManager entitlements file generation and to provide you more flexibility you can specify the entitlements file manually.
In order to provide pre-defined entitlements file, switch Entitlements generation mode to "Manual" and provide pre-defined entitlements file. See the screenshot below: