Have you tried putting together an abbreviated version of your work on github? I've had success with toy utility apps to demonstrate my coding style and basic competencies because I am in a very similar position. Generally I've found it's less about having a large, completed application and more about having a solid chunk that's well architected and demonstrates an understanding of best practices. Like I have a bare bones UI WPF app with multiple projects, dependency injection with a stairway pattern, thorough comments, and decent though not complete unit test coverage. It doesn't do anything special and it only took like a weekend to put together, but it shows I know what I'm doing. It's a private repo and none of the code shows up in Google searches so it's also pretty clear that I didn't just copy and paste someone else's work.