Why is an account not showing up on a report?
If an account is not showing up on a report, and the account is not marked as "Archived," there could be a filter that is excluding the account on the report. You can click the "Reset Criteria" button at the bottom of the report to see if it will then show up.
A Statement of Financial Positions reports on Assets and Liabilities
A Statement of Activities reports on Income and Expense Accounts