by UPI - you mean you are paying directly from bank account or Rupay credit card?
If it is directly from bank account, I don't think there are any exciting offers as such.
But if you have a Rupay based credit card, and you link it to your UPI account, then there are many offers.
Like Tata Neu, Kiwi, Yes Bank Ace etc. You can search "UPI Rupay CC offers" in the forum.