JSON data is not visible on Network while opening React App in mobile [duplicate]

I’m running my react app in PC using npm start

You can now view musical-world in the browser.   

  Local:            http://localhost:3000        
  On Your Network:  http://xxx.xxx.xx.xxx:3000 

I want to see this app on my mobile so, I follow this link http://xxx.xxx.xx.xxx:3000 in mobile and App is visible but my JSON server data is not visible means everything is showing or working fine except JSON data.

My JSON server data is available here http://localhost:3001/songs

So what I need to do here?

Like when i worked on php i used xampp in that case i was able to see my data in mobile even it was on mysql server.