Mongodb realm serveless via netlify - react-native module not found

im using node 14.
i did a basic netlify nodejs function and it works.
but when i include npm i realm, and import realm into the function, im getting react-native module not found.
i realised both cloudflare worker and netlify function uses webpack to compile its function.
Here is the stack of error:

 Error: Command failed with exit code 1: npm run build:functions
    ModuleNotFoundError: Module not found: Error: Can't resolve 'react-native' in 
    '/project/node_modules/realm/lib/browser'
        at /project/node_modules/webpack/lib/Compilation.js:925:10
        at /project/node_modules/webpack/lib/NormalModuleFactory.js:401:22
        at /project/node_modules/webpack/lib/NormalModuleFactory.js:130:21
        at /project/node_modules/webpack/lib/NormalModuleFactory.js:224:22
        at /project/node_modules/neo-async/async.js:2830:7
        at /project/node_modules/neo-async/async.js:6877:13
        at /project/node_modules/webpack/lib/NormalModuleFactory.js:214:25
        at /project/node_modules/enhanced-resolve/lib/Resolver.js:213:14
        at /project/node_modules/enhanced-resolve/lib/Resolver.js:285:5
        at eval (eval at create (/project/node_modules/tapable/lib/HookCodeFactory.js:33:10), 
    <anonymous>:15:1)
        at /project/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:44:7
        at /project/node_modules/enhanced-resolve/lib/Resolver.js:285:5
        at eval (eval at create (/project/node_modules/tapable/lib/HookCodeFactory.js:33:10), 
    <anonymous>:15:1)
        at /project/node_modules/enhanced-resolve/lib/Resolver.js:285:5
        at eval (eval at create (/project/node_modules/tapable/lib/HookCodeFactory.js:33:10), 
    <anonymous>:27:1)
        at /project/node_modules/enhanced-resolve/lib/DescriptionFilePlugin.js:67:43
    resolve 'react-native' in '/project/node_modules/realm/lib/browser'
      Parsed request is a module
      using description file: /project/node_modules/realm/package.json (relative path: ./lib/browser)
        resolve as module
          /project/node_modules/realm/lib/browser/node_modules doesn't exist or is not a directory
          /project/node_modules/realm/lib/node_modules doesn't exist or is not a directory
          /project/node_modules/realm/node_modules doesn't exist or is not a directory
          /project/node_modules/node_modules doesn't exist or is not a directory
          /home/james/www/node_modules doesn't exist or is not a directory
          /home/james/node_modules doesn't exist or is not a directory
          /home/node_modules doesn't exist or is not a directory
          /node_modules doesn't exist or is not a directory
          looking for modules in /project/node_modules
            using description file: /project/package.json (relative path: ./node_modules)
              using description file: /project/package.json (relative path: ./node_modules/react-native)
                no extension
                  /project/node_modules/react-native doesn't exist
                .wasm
                  /project/node_modules/react-native.wasm doesn't exist
                .mjs
                  /project/node_modules/react-native.mjs doesn't exist
                .js
                  /project/node_modules/react-native.js doesn't exist
                .json
                  /project/node_modules/react-native.json doesn't exist
                .ts
                  /project/node_modules/react-native.ts doesn't exist
                as directory
                  /project/node_modules/react-native doesn't exist
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! shopnet@1.0.0 build:functions: `netlify-lambda build functions`
    npm ERR! Exit status 1
    npm ERR! 
    npm ERR! Failed at the shopnet@1.0.0 build:functions script.
    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

    npm ERR! A complete log of this run can be found in:
    npm ERR!     /home/james/.npm/_logs/2021-11-13T06_32_22_233Z-debug.log

    > shopnet@1.0.0 build:functions /project
    > netlify-lambda build functions

    netlify-lambda: Building functions
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! shopnet@1.0.0 dev: `netlify dev`
npm ERR! Exit status 1

example code i use in my handler

import Realm from 'realm';
const realmApp = new Realm.App({
  id: REALM_APP_ID,
});
Realm.App.Sync.setLogLevel(realmApp, 'debug');