Possible solution for missing google account 
- 2021.07.14 14:21 (UTC+0)
in this Reddit thread I’ve explained (more or less good) how to get your missing account back. I don’t know if it’s allowed to share Reddit links here but in case I’ll make a copy paste from there.
Luckily it worked for someone already and I really hope it’s gonna work for you as well.
I’ve read many different topics about the missing case. I can’t say if this is gonna work but I’ll try to help, because something like this also happened to me back then.
My google account was bound to my hotmail but one day why the hell ever it turned to gmail. I was still able to connect into the game with the changed gmail. If I tried with my hotmail it automatically connected to the gmail.
I had a lot of trouble and also tried to get help from the support. Days passed and I didn’t even get a response. So I tried many different things and one of the things was to delete my hotmail from the alternative email in my gmail account.
So I created again a google account with my old hotmail which I always used for the game and it worked.
Remove your hotmail or whatever you have used for google from the alternative email section in your gmail account and create a new google account with your main hotmail again.
I hope you guys understand the stuff I just wrote. My discord name is Drish#0799. If you need help just pm there in case I miss something here.