No, the OnePlus mobile phone is not allowed to use Huawei account, first of all, only Honor and Huawei can.
The Oneplus mobile phone cannot log in the Huawei account in the OnePlus community. If there is Huawei software such as Huawei Mall on the mobile phone, you can log in with Huawei account
You can download a Huawei center, you can log in, but it is not useful, because the phone does not provide Huawei services
It's not interoperable. Different phone brands.