Do you mean to say
Point 1 is Instead of the bank I need UPI Field for the withdrawal
Point 2 is On the admin side needs a PAY button beside every user who requested a withdrawal and by clicking it from a mobile it should take the admin to any of the UPI APP installed on his or her mobile ((from a desktop or laptop it should ask to scan the QR from mobile) along with the Payee mentioned UPI ID and the amount he asks for

but we can’t open UPI app by clicking on the PAY button. As you said but here I do not want you to open a UPI app I want you to allow the admin to choose any installed app on his mobile so once he chooses it should carry the Payee mentioned UPI ID and the amount he asks for… is this is possible

In my case, I think i don’t have to renew any further