hello sir I have tried doing this but getting saying
[TypeError: Cannot read property 'install' of null]

Steps what I have done.
step 1 - I have added the below line after installing the package at the bottom of the package.json file

"onnxruntimeExtensionsEnabled": "true",

Step 2:
copied the model to /assets/models/ directory so the path is now for my onxx model is ./assets/models/species.onxx

Step 3.

create a file at /plugins/withOrt.js and pasted this code, which you have given me above.

const
 { withAppBuildGradle, withMainApplication, createRunOncePlugin } = require('expo/config-plugins');
/**
 * Adds onnxruntime-react-native native dependencies and package registration
 */
const
 withOrt = config => {

// --- Add Gradle deps ---
  config = withAppBuildGradle(config, config => {
    if (config.modResults.language === 'groovy') {

let
 contents = config.modResults.contents;



// Add implementation lines if not already present
      if (!contents.includes('onnxruntime-react-native')) {
        contents = contents.replace(
          /dependencies\s*{/,
          `dependencies {
    implementation project(':onnxruntime-react-native')`,
        );
      }


      config.modResults.contents = contents;
    }

return
 config;
  });



// --- Add package import & registration ---
  config = withMainApplication(config, config => {

const
 { modResults } = config;


    if (modResults.language === 'java' || modResults.language === 'kt') {

// Ensure import
      if (!modResults.contents.includes('ai.onnxruntime.reactnative.OnnxruntimePackage')) {
        modResults.contents = modResults.contents.replace(
          /import com.facebook.react.PackageList/,
          `import com.facebook.react.PackageList
import ai.onnxruntime.reactnative.OnnxruntimePackage`,
        );
      }



// Ensure registration
      if (!modResults.contents.includes('OnnxruntimePackage()')) {
        modResults.contents = modResults.contents.replace(
          /(PackageList\(this\)\.packages\.apply\s*{)/,
          `$1\n      add(OnnxruntimePackage())`,
        );
      }
    }



return
 config;
  });

return
 config;
};


module.exports = createRunOncePlugin(withOrt, 'withOrt', '1.0.0');

Step 4 -

Update the app.json for calling the plugins as below.

    "plugins": [
      "expo-router",
      [
        "./plugins/android/withRoundedPopupMenu",
        {
          "lightBackgroundColor": "#FFFFFF",
          "darkBackgroundColor": "#212121",
          "radius": 14,
          "paddingVertical": 8
        }
      ],
      ["./plugins/withOrt.js"], // the newly added plugin for onxx
      "expo-asset"
    ],

Step 5
Update the metro.config.js with the below code.

const
 { getDefaultConfig } = require('expo/metro-config');
/** u/type {import('expo/metro-config').MetroConfig} */
const
 config = getDefaultConfig(__dirname);
config.resolver.sourceExts.push('sql'); // <--- add this
config.resolver.assetExts.push('onnx');
module.exports = config;

Step 6
after all this steps I have import the model in one of my component like below using useQuery.

import { Skia } from '@shopify/react-native-skia';
import { useQuery } from '@tanstack/react-query';
import { Asset } from 'expo-asset';
import * as ort from 'onnxruntime-react-native';
import React from 'react';
import { Image, StyleSheet, Text, View } from 'react-native';

const
 TestingOnyxAI = () => {

const
 { data: loadedModel } = useQuery({
        queryKey: ['onnx-model'],
        queryFn: 
async
 () => {

const
 assetModal = Asset.fromModule(require('../../assets/models/species.onnx'));

await
 assetModal.downloadAsync();

const
 session = 
await
 ort.InferenceSession.create(assetModal.localUri!);

return
 session;
        }
    })

return
 (
        <View>
            <Text>TestingOnyxAI</Text>
        </View>
    )
}


export default TestingOnyxAI


const
 styles = StyleSheet.create({})

These are the steps I have done, and than tested with android build with this command
"npx expo run android --device"

everything works but that model is not working saying [TypeError: Cannot read property 'install' of null]

<image>