I'm thrilled to report that I just found this new way to get Google Mobile Services to work on Huawei and Honor devices that don't have them.
It's totally working [today is 20 june 2020] and it SOLVES the new problem that doesn't let the users sign-in to their Google accounts at the time of the installation.
Everything is very detailed and shown step-by-step on the following video...
Please be sure to download the .zip file that has all the stuff needed to get this to work. Using this method, that zip file must be copied to the root a pen-drive. It's here, for Android 10: https://bit.ly/2ATWPGE
[UPDATE - 29 / June / 2020]
- You must have your phone in english in order to proceed with this method.
- After it is complete you can switch back to your preferred language, without problems.
- If you want to add more Google accounts, you should do this procure while you are installing GMS. Use this link: https://youtu.be/jgCN6SeP32c?t=1418 It guides directly to the right moment in that video.
By the way, it's working great for a lot of users. Push notifications, though, aren't working.
Still, I believe this is the best method around.