If you include bitcode when you upload your app to App Store Connect, the App Store compiles the bitcode and generates the dSYM files. In Xcode, you can download the dSYM files from App Store Connect before you view crash or energy logs on devices.
In the Archives organizer, select the archive.
Click the Download Debug Symbols button.
Xcode inserts the .dSYM files in the selected archive.
When the dSYM files are indexed by Spotlight they will be used to automatically symbolicate crash and energy logs in the Crashes and Energy organizer. In addition, the dSYM files will be used to symbolicate logs that are found on devices that appear in the Devices and Simulators window.