Is there an Android equivalent of a .reality file so I can export my RealityComposer project and share with an Android phone?
View .reality file in Android
No, Right now there isn't any way to do that.
Hi, the only think you could do is export your project as a usdz since that is an open source format. However, I’m not sure if Android supports usdz rendering, and you also would lose some of the features you have with reality files.