Here is my update:
Used 2 HDFC Platinum DC using SBI UNIPAY for completing following payments:
1. HDFC (Neu Infinity): Payment reflected Instantly.
2. HDFC DCP: Payment reflected instantly
2. AMEX MRCC: Took 24 hours to reflect in AMEX
3. ICICI: Did not fetch the amount on first day. Next day SBI UNIPAY fetched amount and payment reflected instantly
4. SBI: Still not able to fetch amount to make payment 🤡
5. IDFC: Payment reflected instantly.
6. HSBC(for a friend): Took 24 hours to reflect.
Received 1% CB for all cc payments using HDFC Plat DC + SBI UNIPAY
I heard a similar story with HDFC Plat DC + Jio Finance