Do you have multiple CRN of KOTAK bank??
If yes, then you can't link your rupay card to any bhim UPI app.
I have kotak league rupay card sing June 2023 with multiple CRN,
When I raised complaint about this, they gave me tareekh of Nov. 23,
that in nov 23, customer who have multiple CRN can use UPI app
Then tareekh pe tareekh 😤
So I give up,
As I am using TATANEU RUPAY card more frequently as it was more beneficial