Dell U4025QW not found TB4/USB-C

Hi folks

I recently got the Dell U4025QW display. I’ve got the framework 13” AMD 7840U running windows 11 pro (23H2).

Everything is up to date, I’ve installed the Dell drivers for the monitor and still the laptop doesn’t recognise the monitor is connected as a display. I’m using the top left USB-C output from the laptop to the TB4 power delivery (140w) input into the monitor.

The TB4 hub element works fine, and the laptop recognises the external keyboard and mouse connected that are connected to the monitor.

Windows does not recognise that an external display is connected at all.

Works fine on my MacBook Pro M1 Pro.

Any thoughts or suggestions welcome!!