Is it possible to leverage Yubi key instead of Duo push for admin login?
While we currently do not support U2F/WebAuthN for the Duo Admin Panel, many customers use their Yubikeys in OTP mode for Duo Admin Panel Access.
To add a Yubikey in OTP mode, take a look at this guide → Duo Administration - Configuring YubiKeys for OTP use with Duo | Duo Security
Once you’ve added the OTP token, you can add it to your Administrator account via Duo Administration - Manage Administrators | Duo Security.
Hope this helps!