It let’s you access Windows 365 and Azure virtual desktops but nothing local

No they just have no replacement for it yet other than the inbuilt RDP app that comes with Windows (or third party apps). I don’t believe the protocol itself is changing

Even better than that, the old remote desktop app from the Windows store is being discontinued and has a banner at the top telling you to use the Windows app instead. The new Windows app does not support RDP on Windows:

https://learn.microsoft.com/en-us/windows-app/get-started-connect-devices-desktops-apps?tabs=windows-avd%2Cwindows-w365%2Cwindows-devbox%2Cmacos-rds%2Cmacos-pc&pivots=azure-virtual-desktop