Answer from Oneplus support chat
Unfortunately, there is no option for that right now. You will need to use another gmail account without YubiKey so you can install the applications that you want to yur OnePlus 3T.
Me requesting a plan when the feature will be implemented
I will take note on that information and forward that to our ROM Team and hopefully, it will be available in the future.
I required them to inform me about the implementation but they could not offer a strict schedule.
Whatsapp's support answer
Confirmation that Oneplus Google Drive backup is not supported in Oneplus by WhatsApp
Thanks for your message.
The user cannot directly access data in the hidden app folders, only
the app can access them. WhatsApp data is on a hidden folder in your
Google Drive. To check whether or not your backup file is saved in
Go to Google Drive (https://drive.google.com) and log in to your
Google account. If you are accessing the link from your phone, you
have to tap the [Menu Button] in the top left corner and then choose
to use [Desktop Version]. Click on the [Gear] icon in the top right >
[Settings] > [Manage Apps]. Scroll until you find WhatsApp in the
list. Please note it may take several minutes for WhatsApp to appear
in the list. Additionally, you can wait until “Hidden app data” size
appears if you wish to see your WhatsApp backup size. Note: This may
take several minutes. Learn more about Google Drive backup in this FAQ
Note: If you wish to read your chat history on your computer, please
use our Email chat feature instead.
Thank you for your understanding and cooperation.
WhatsApp Support Team
Output: you cannot access the data directly, only see the size of the backup file.