5.2.1 didn’t work for me either. However, I got a different error
AutomationException: CodeSign Failed
at IOSPlatform.CodeSign(String BaseDirectory, String GameName, FileReference RawProjectPath, UnrealTargetConfiguration TargetConfig, String LocalRoot, String ProjectName, String ProjectDirectory, Boolean IsCode, Boolean Distribution, String Provision, String Certificate, String Team, Boolean bAutomaticSigning, String SchemeName, String SchemeConfiguration) in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/IOS/IOSPlatform.Automation.cs:line 1184
at IOSPlatform.Package(ProjectParams Params, DeploymentContext SC, Int32 WorkingCL) in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/IOS/IOSPlatform.Automation.cs:line 772
at AutomationScripts.Project.Package(ProjectParams Params, Int32 WorkingCL) in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/Scripts/PackageCommand.Automation.cs:line 48
at BuildCookRun.DoBuildCookRun(ProjectParams Params) in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/Scripts/BuildCookRun.Automation.cs:line 223
at BuildCookRun.ExecuteBuild() in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/Scripts/BuildCookRun.Automation.cs:line 42
at AutomationTool.BuildCommand.Execute() in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/AutomationUtils/BuildCommand.cs:line 344
at AutomationTool.BuildCommand.ExecuteAsync() in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/AutomationUtils/BuildCommand.cs:line 353
at AutomationTool.Automation.ExecuteAsync(List1 CommandsToExecute, Dictionary2 Commands) in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/AutomationUtils/Automation.cs:line 257
at AutomationTool.Automation.ProcessAsync(ParsedCommandLine AutomationToolCommandLine, StartupTraceListener StartupListener, HashSet`1 ScriptModuleAssemblies) in /Users/build/Build/++UE5/Sync/Engine/Saved/CsTools/Engine/Source/Programs/AutomationTool/AutomationUtils/Automation.cs:line 156
AutomationTool executed for 0h 1m 28s
AutomationTool exiting with ExitCode=32 (Error_FailedToCodeSign)