I have tried same with next Js application

First need to get local ip address and then port running 3000 i used on phone

I can able to access application properly. It works if 2 devices connected in same network only. Same as ngrok. But over than internet it wont work

I followed this guide which helped Maybe useful for you too Check https://freesv.com/how-to-access-localhost-on-mobile-within-the-same-network/