Solve this Razorpay Flutter issue

I'm trying to integrate razorpay on my Flutter app. All payment methods are working except third party UPI payments. You can check the GitHub code in the link given below.

https://github.com/Flutter-App-2021/Payment_Test

Refrence video: https://drive.google.com/file/d/1ydkGU5vUhELlHh9rtjWAA_vjTlbWTf5w/view?usp=drivesdk