How to convert dynamic MERN(full stack) website to Android app(.apk)?

I am having an existing MERN stack app which is not deployed. I want to convert it into an Android app and use it to test mobile features (like Bluetooth connectivity, not using web-Bluetooth). My ReactJS frontend is getting fetched from backend and its entirely based on the MongoDB & NodeJS. I tried to use ionic Capacitor, but only a blank screen gets displayed on my emulator in the Android Studio. Does capacitor work in converting back-end code too? If so, how can we do it? And Is there any other alternative to transform/convert the website without hosting or changing the codebase to other technology like native?

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