Hi,
Thank you for writing to Microsoft Community Forums.
We understand how difficult it could be and we truly appreciate the time and effort that you have taken to work on this issue. However, we would suggest you to refer Can't connect my phone to a computer for troubleshooting steps.
Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.
If the issue still persists and it is isolated to connecting only the Huawei phone. This could be an issue with the phone. So we would suggest you to contact Huawei Support.
Regards.