Hi Fifo,
Having worked with some software that requires the automatic delivery of a customer’s bank account transactions via a file to be able to process the transactions, I am 99% sure this is not an MYOB issue and is dependent on the bank delivering the file.
A few banks will supply a bank file with the previous days transactions every day, NAB from memory are one who will do every day. Others (seemingly most) will not supply files for the weekend and also public holidays.
This means you can/may get a file on Saturday containing Friday’s transactions and then not get another file until Monday with Saturday and Sundays transactions.
The banking industry are not that great at moving with the times unless it is putting in systems that can charge fees.