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Our tests have shown that the Sonnet Thunderbolt 3 Extender Box (Sonnet Echo Express SE III) is currently not usable under Windows 11.
This is because of Windows 11 currently does not support multiple-slot Thunderbolt system expensions.
Using it under Windows 11 either does not show any installed external hardware is shown or leads to system crashes.

Microsoft has announced such a support for Windows 11 23H1.

There is also a note from the Extender Box manufacturer about this:
See link: https://www.sonnettech.com/product/echo-express-se3e/techspecs.html#videos