Hello 
, Unfortunately, it is not possible to run a UE5 (Unreal Engine 5) ArchViz project directly in WhatsApp as a standalone application or as part of a chat message. WhatsApp does not support running complex 3D applications like those built with Unreal Engine.
However, you can create a mobile ArchViz project in UE5 and then export it as an APK for Android devices or an IPA for iOS devices. To share your ArchViz project with others, you can upload it to an app store or distribute it using another method, like hosting the APK or IPA on your website.
If you still want to showcase your ArchViz project within WhatsApp, you could consider creating a video or a series of images demonstrating your project and then sharing those through WhatsApp. This method, however, will not provide the interactive experience you would get with a fully compiled application.
Another alternative to consider is to create a Web-based version of your ArchViz project using a technology like WebGL. This will allow users to view and interact with your project in a web browser on their mobile devices. You can then share the link to the web-based project through WhatsApp. However, this method may require rebuilding your project using a different game engine, like Unity, which has more robust support for WebGL.