While Microsoft confirmed removal of  some existing Windows 10 features from the Windows 10 version 2004 back in May 2020, it has now confirmed two more removed features. The company has added the Connect app for wireless projection using Miracast and Rinna and Japanese Address suggestion to this list.

Microsoft earlier confirmed removal of some Cortana features, Windows To Go and Mobile Plans and Messaging apps in Windows 10 version 2004. Here is the full list.

Connect appThe Connect app for wireless projection using Miracast is no longer installed by default, but is available as an optional feature. To install the app, click on Settings > Apps > Optional features > Add a feature and then install the Wireless Display app.2004
Rinna and Japanese Address suggestionThe Rinna and Japanese Address suggestion service for Microsoft Japanese Input Method Editor (IME) ended on August 13th, 2020. For more information, see Rinna and Japanese Address suggestion will no longer be offered2004
CortanaCortana has been updated and enhanced in the Windows 10 May 2020 Update. With these changes, some previously available consumer skills such as music, connected home, and other non-Microsoft skills are no longer available.2004
Windows To GoWindows To Go was announced as deprecated in Windows 10, version 1903 and is removed in this release.2004
Mobile Plans and Messaging appsBoth apps are still supported, but are now distributed in a different way. OEMs can now include these apps in Windows images for cellular enabled devices. The apps are removed for non-cellular devices.2004

You can however get the Connect app back by installing it via optional features. Just go to Settings > Apps > Optional features > Add a feature and then install the Wireless Display app.