No solution cause it works fine.
It may be a good idea to stop telling everyone that "it works fine", because it obviously doesn't. I'm doing small-scale system administration (a dozen Macs), and the Google Drive icon will
never appear on any of the brand new Macs I'm installing Google Drive on (1st thing after installing 1Password).
It - just - doesn't - work. You do understand what the "Desktop" is, right? Because you seem to be confusing Dock, Sidebar and Desktop in this thread.
For now, I just command-option drag an alias from the sidebar to the desktop to make my users quickly access Google Drive through the desktop, but it's not the nice Google Drive icon, and it has the alias-arrow. Yeah, I can change the icon, but come on, this is something that used to work pre-Monterey.