If you are facing issues launching your iOS application in VS Code, then try to analyse the Debug Console of your application.
If you see things like this:
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/Newtonsoft.Json.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/System.Reflection.Emit.Lightweight.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/System.Reflection.Emit.ILGeneration.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/System.Reflection.Primitives.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/System.Data.Common.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/Syncfusion.Maui.Inputs.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/ZF.Packages.Maui.Fonts.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/ZF.Packages.Maui.Views.Alerts.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/Refit.HttpClientFactory.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/Microsoft.Extensions.Http.dll
Loaded assembly: /private/var/containers/Bundle/Application/50529075-A03E-45EC-99F6-0A539036E226/app.app/MetroLog.Maui.dll
And then your application suddenly crashes showing the splashscreen, then the debugger might be slow.
For me in Visual Studio code the solution was to disable in the C# extension’s settings the Debug > Logging: Module load feature.