Instead of manually creating individual account transactions and matching them to imported bank lines, we can automate both these processes using auto-create rules. Auto-create rules enable us to automatically create and match the transactions.

But unfortunately, NetSuite can do this only for following transactions:
- Deposits and charges for general ledger bank accounts
- Charges and refunds for general ledger credit card accounts

For these cases, if we import bank lines with a recurring Payor/Payee or Memo, auto-create rules look for imported bank lines with the transaction type and Payor/Payee specified by the rule. If the imported bank line has no Payor/Payee, the rule looks for the Memo that was specified.
This automatic functionality is not available for creating Journals. We do have an Enhancement Request 614510 Transactions > Bank > Match Bank Data > Match Journal Entry > Make Auto-Create Rule From Selected Transactions is available logged for this feature request.
For more information, refer SuiteAnswer #95134.