Version 1.2.790 of the Windows Desktop client for WVD has been released to all users!

You can get on the Beta releases train, referred to as the Insiders user group to get releases 2 weeks early and provide feedback to ensure a smooth release. It's encouraged that all companies have some users on the Insiders group.

Follow the steps here to set the policy to switch the client to Insiders:

https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/windowsdesktop-admin#configure-user-groups