npx expo install expo-asset expo-file-system

   plugins: [
+    "expo-asset"
   ]

npm install --save-dev @expo/metro-config 

 const {  getDefaultConfig } = require("expo/metro-config");

 const config = getDefaultConfig(__dirname);
+config.resolver.assetExts.push("txt");

 module.exports = config;

async function readTextAsset() {
  try {
    const nodeRequire = require("@/assets/filename.txt");
    const asset = Asset.fromModule(nodeRequire);
    await asset.downloadAsync();
    if (asset.localUri) {
      const fileContents = await readAsStringAsync(asset.localUri);
      // Do something with `fileContents`
    }
  } catch (error) {
    console.error(error);
  }
}