Where is your old phone? Broken? Why not just turn it on and get the 2FA code??
I got it replaced, so its in the possession of Apple
It's kinda weird that you replaced your phone and didn't ask Apple to back all the important data into your new phone

Anyway, either you can contact YoBit Support (Which is nonexistence at this point)
Or go back to the Apple store and ask to bring them your old phone for backing up your data, though I doubt they can do that unless you know for sure which one is your phone by IMEI
Just my two cents

The frustrating part is that I did get my phone backed up. However for some reason the authentication app did not save the code. I do not know why