The trial balance only lists accounts, not sub-accounts.
If you are needing a list of bank accounts and their balances, click on the Cash Accounts tab then right click on the screen - select print preview or print.
Also, the new feature Custom Control Accounts allows you to list/place individual accounts (or groups of accounts) on to the balance sheet, then these will list on the trial balance. (The latest versions has this feature as part of Settings - COA, Earlier versions (from 16.6.32) had it set up as a separate Settings function)