How to enable SystemExtension developer mode

In the video, it was mentioned that the machine the presenter was using was running in System Extension developer mode to make things easier to develop and test. How does one go about enabling this mode? What sorts of things does it make easier? Is there documentation around this mode?
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You do this using the systemextensionsctl tool. This has a man page but it’s not very useful. Running the tool without any arguments prints a list of options that’s relatively self explanatory.

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Follow Debugging and Testing System Extensions

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Security Engineer
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