If you haven’t checked the “Include Source Code” option it means that the published NuGet package (nupkg) won’t contain the original XAML files or source code of your workflow
To get the Xmal Files:
If you are working in a team or with colleagues, check if anyone else has access to the source code or the original XAML files. They may have saved a copy or have access to the code.
If you were using a version control system like Git, SVN, or TFS with your project, you might be able to retrieve an older version of the project that still contains the XAML files.
Download and install a free app called DotPeek from JetBrains. It will allow you to extract the source files from the DLLs inside the .nupkg. Rename the .nupkg file to .zip and open it in Windows. Open the DLL in DotPeek.
Or, If the above options don’t work, you may need to recreate the workflow from scratch.
If your workflow is critical and none of the above solutions work, you can contact UiPath support for assistance. They may have additional tools or methods to help you recover your workflow.
Set Studio to include the source files when publishing. Backups. Version control/code storage solutions like Git and SVN. These are things you should have in place as part of standard policies so that you don’t lose code.
Since you’ve already lost it, your option is to extract the files from the DLL with the tool I gave you.