Hello,
Thank you for sharing your questions about Windows Credentials Guard. Your feedback is valuable in this regard.
Currently, Remote Credential Guard does not support credentials saved by remote desktop client devices.
(Image source: Remote Credential Guard - Windows Security | Microsoft Learn )
You can upload your user experience and needed improvements about Microsoft products in the Feedback Center.
Microsoft will continue to evaluate and improve its products to provide the best user experience while maintaining a high level of security.
If you have any further questions, please contact us.
Best regards
Jacen