Hello Paul,
I am not sure this will help :D

I am trying to connect ONEPLUS 8 phone with all the diagnostic ports and to tell the truth I have already messed with the drivers before, so all this could be my fault.
Usual way for me how to solve this is by going Device Manager -> properties -> driver -> update driver -> browse my computer -> let my pick ->
Then I am usually able to pick HS-USB Android DIAG 9018 from the list. But on this laptop, there are just USB composite device drivers.

So I believe I have some sort of driver issues with the QUALCOMM devices... I reinstalled the QUALCOMM driver again in hope this would fix the issue, but no luck there. Is there any way how to uninstall the QUALCOMM drivers so I can install them again? I have tried to uninstall the device, but it did nothing with the driver.
I really appreciate any help :)