Hello,
CodeWarrior v6.3 is not compatible with windows 11; to use CodeWarrior in windows 11 please update to v11.1, this is the reason why you can't install CW v6.3 in windows 11.
Could you share what your connection of P&E USB Multilink shows in Device Manager>Jungo Connectivity?
Does it appear somewhere else? or have a warning sign?
For example, I have this setting for P&E USB Multilink:

In USB Multilink Universal and USB Multilink Universal FX Technical Summary [USBMLUNIVERSALFX] documentation Chapter 6 Driver Installation mention that a copy of the driver installation program may be downloaded from P&E page "Support Center">Downloads. if you need an updated driver.
Best Regards,