I've been using ubuntu 18.04 since it's release and I've always had problems using the integrated Google Drive feature.
It takes a LONG time to load the files from my Google account, exactly like the problem reported in this question: Google Drive takes a very long time to open with GNOME Online Accounts
Recently, I downloaded the 20.04 daily build image to test, and voilà! It works like a charm!
What happened? It's a fix in nautilus itself, or a gnome fix? Is there any way to reproduce the same behaviour on 18.04?
Edit: The same thing is observed on 19.04. Loading times are reasonable.