Select 'Pay' followed by 'Pay Anyone via osko'. When selecting the 'payee' you will be given the option to enter a PayID instead of having to enter a BSB and account number.
If using a PayID be sure to check the PayID name shown is correct before proceeding. The responsibility is on you to ensure that the payment details are correct before processing a payment.
There is no guarantee that mistaken payments can be retrieved. Be sure to check your transaction history after processing an Osko payment to check the transaction was successful.