generally the consensus of Security keys is that the backup should ideally not be a weaker method like normal password and/or TOTP codes or whatever but another security key, yet some sites are sadly not capable of letting users use these as they only allow one of these to be connected to their account.
Just like The Devolutions account.
would be nice to be able to register more.
regards
Hello,
We are currently working on this functionality (multiple security keys per accounts) alongside other improvement concerning passwordless login.
Thank you for your feedback, we are continually trying to make our login experience more convenient and more secure.
Regards
Richer Archambault