Bitwarden on Chrome OS

I have my mom setup and subscribed to Bitwarden. Her primary computer has been replaced by a Chrome box. She previously used a Windows machine. I notice that the chrome extension works even though there is no chrome os client. What do you lose functionality-wise going from windows to Chrome OS?

On Windows, the desktop client handles the fingerprint biometric login through the windows hello integration. If the chrome os device has a finger print reader, how does that integrate with bitwarden?