To add custom capabilities to an Xcode project built by Unity Build Automation, use a PostProcessMethod with Unity's Xcode manipulation API and Project Capability Manager to automate capability addition after build completion.
Symptoms
I want to add some custom capabilities to my Xcode project after it's built by Unity Build Automation.
Resolution
To add custom capabilities, we need to run a custom script that will add these capabilities automatically after Unity Build Automation generates the Xcode project.
To achieve this, you can create PostProcessMethod and use the Xcode manipulation API to add the specific capability you need using the Project capability manager.
More Information
For more information on Unity Build Automation, read here.