Hi there, mani_1.
Currently, there's no option to enter or save the supplier's bank account details. For now, you can enter the Account no, Business ID No, and other necessary information. I also suggest adding the bank account details to the Notes section.
I attach a screenshot below for visual reference.
Then, I recommend going to the Plus icon at the upper left corner. From there, you can choose the transaction type you need to enter for the suppliers.
Please check this article on how you can run a report that reflects all payments made to suppliers: Run a report with supplier totals.
Please know that you're always welcome to post if you have any other concerns. Wishing you and your business continued success.