Hi @sujeshmathew ,
Good day!
The app being rendered is in itself an iframe and I don’t think you can communicate with external embedded site in a real-time fashion directly until you have something like a realtime webhook exposed by them.
But, one solution which I could think around is to use something like firebase real-time database triggers. With a solution like this, you can make both of your applications utilise this & facilitate communication. Again, this may not the best solution you’d be looking for. Still, check if it helps.
Thanks.