However, it still seems impossible to use a security key to authenticate adding a Google Account to GNOME via the Online Accounts section in settings. This is problematic given enrollment in Google's Advanced Protection Program necessitates the usage of a security key for such authentication (and prohibits alternatives like a one-time password).
I just updated to 20.04 LTS today. In the Canonical press release for 20.04 they mention that FIDO support was integrated into this release: https:/ /ubuntu. com/blog/ ubuntu- 20-04-lts- arrives
However, it still seems impossible to use a security key to authenticate adding a Google Account to GNOME via the Online Accounts section in settings. This is problematic given enrollment in Google's Advanced Protection Program necessitates the usage of a security key for such authentication (and prohibits alternatives like a one-time password).