UPI Payment Integration with Auto-Update -- 3

Many shops will be listed on my app, now I need a UPI payment integration example where customer can pay directly to the Shop Keeper's UPI id instead of my app account and should receive response upon payment completion.

Current Attempt:
- We have a page where we can enter any UPI Id
- It genereated QR code.
- Customer scans the QR code and pays

Requirements:
- After payment is done, we need a way to receive response upon payment completion
We we tried creating: https://lokalneeds.in/new/Shoppayemnt.html
or
https://lokalneeds.in/new/upi-payment/index.php


Ideal Skills and Experience:
- Experience with UPI payment integration
- Proficient in QR code generation
- Web development skills to implement page logic and updates
- Familiarity with frontend frameworks for a smooth user experience

Our website is in PHP. We have Payu payment gateway.

Someone tried this and said PayU does not generate QR codes that directly credit a shopkeeper’s UPI without passing through PayU.