Yeah perhaps but its super light to implement. In fact my entire Client's apk is only 8mb even after the Webxdc support was added

Yep, if you don't care about security, the browser can just share the same memory of the app in a way that they can see each other. Then it's super easy. Kotlin has this baked in. But only because it uses the default installed browser on Android. There is nothing like that on Kotlin desktop.