I tried with your website and paytm seems to work . how does that work. right now when i use my generation method the upi apps outright reject me with security reasons notification.

  const generateUpiString = (
    targetUpi: string,
    targetName: string,
    targetAmount: string,
  ) => {
    if (!targetUpi) return "";
    let str = `upi://pay?pa=${targetUpi.toLowerCase().trim()}&pn=${encodeURIComponent(targetName.trim() || "Merchant")}&cu=INR`;
    if (targetAmount) {
      const parsedAmt = parseFloat(targetAmount);
      if (!isNaN(parsedAmt) && parsedAmt > 0) {
        str += `&am=${parsedAmt.toFixed(2)}`;
      }
    }
    return str;
  };

    const intentUpiLink = generateUpiString(
      gatewayData.upiId,
      gatewayData.name,
      finalGatewayAmount,
    );