Google Sign-in not working in new Huawei devices: "There was a problem communicating with google servers" Between the 11th and the 13th of September 2020 something has changed around the method used to log into Google accounts from new Huawei devices after installing Google Mobile Services (GMS).
Before, the method involved installing GMS-related apps and signing into the relevant Google accounts using browser sign-in (a legacy sign-in method kept for old android versions). However, it seems like just after Huawei announced Harmony OS, that backdoor was closed.
Is there any way to sign into Google accounts for GMS from a new Huawei device (such as a P40 pro)?

Disclaimer 1: I hope no one gets offended by this question being asked... I think that from a consumer perspective it is legit to try to find solutions to the side effects of what effectively seems to be a trade war.
At the end of the day, there are hundreds of thousands of users
affected by this situation and they are not the ones to blame for any conflict between governments and/or companies.


Disclaimer 2: The consequences of the ban get to an absurd level, is not just not having Google Play Store, but for example not being able to log into your Google account from your browser to sync passwords, history and bookmarks... Hope this helps people not experiencing the ban understanding the extent of it.
You should change your phone identification to any other smartphone brand and to change IMEI codes as well but let me tell you that it's against the law and I do not encourage it.
But in your place, I will simply sell it on any online platform and buy another smartphone with not a banned brand such as Samsung or Nokia.