Hi there,
You can check this is in Known issues and troubleshooting for hybrid FIDO2 security and then report this to the feedback app.
To collect data that helps troubleshoot issues with signing in to Windows or accessing on-premises resources from Windows 10 devices, complete the following steps:
Open the Feedback hub app. Make sure that your name is on the bottom left of the app, then select Create a new feedback item.
For the feedback item type, choose Problem.
Troubleshooting for hybrid deployments of FIDO2 security keys in Azure AD
https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-authentication-passwordless-troubleshoot
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