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Is it true that using a third-party .NET Framework driver in a UWP application is not possible?
Yes, it is not possible to do that.
Are there any workarounds or alternative approaches to solving this issue?
A workaround is that you could create a console application and use the driver in that console application. Then package the console application with your UWP app together using desktop bridge.
When the UWP app is running, it could launch the console application to do the task that you need. For more detailed steps, you could open your favorite search engine and search for UWP with Desktop Extension written by Stefan Wick. That blog contains full tutorial about how to implement this.
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