one thought since the error you showed before
says that the ezspVersion is null that also points to either driver or incorrect communication with the device.
With OpenHAB saying it is attached comm3 to the binding it still acts like that dongle is not presenting the correct serial Interface Protocol
It might be you have a knock off version of the dongle. a ali express special 
even if you did not buy it from them directly.
As for needing to set serial settings in windows ? Nope I never did. You could try clicking restore default in device manage advanced settings for that comm port.
The correct driver should auto negotiate with the serial USB UART for correct settings.
I have not ever needed to change mine in windows device manager actually unless I was using windows terminal and that was many years ago in a much older version of windows like maybe back in the days of windows NT!
This is could also be a driver issue please take a look at this you have the driver loaded for a P version cp2102(N) is dongle P
notice the USB-serial Chip version
compare with the driver you loaded. cp2102(N) is for dongle P only
dongle E uses the CH9102F or a cp2102N notice the no ()
you may need the other driver for a CH9102F serial chip.
One of my dongles also had the CH9102F and I had to get the OEM driver when I loaded win 11 to make it work you might have hit that snag as well here is what shows on my win 11 device driver for my PLUS V2 E dongle
without taking your heat sink off and actually looking at what is soldered onto the board the only other thing I can suggest is you might try and search for ch343ser in google and pull down the chip manufacturer OEM win 11 driver and see if that helps.
The CH343ser version I have extracted into a folder from when I downloaded it is from 9/19/2023.
I absolutely did not update this driver on 7/19/2025 for an absolute fact. So that tells me after it got correct driver initially then windows must have updated it as part of some monthly patching cycle.
This by the way is what it looks like in windows 10 for my PLUS V2 E dongle
notice it uses the default Microsoft serial driver but that may be because I use that one on a VM and a USB device server.
and this is what shows for a Dongle P version (on server 2019) that I use for zigbee2MQTT.
for what it is worth here is the link to the OEM chip manufacturer driver download for the CH9102F chip. i.e the Ch343ser executable and CH343CDC executable as well. according to the notes on that site the CH343CDC is the customer distributable version.??..
hope that helps