query all audit entries defined with 'audit' command
Depending on the method you use for auditing, you can find that information in the below views:


DBA_OBJ_AUDIT_OPTS
DBA_STMT_AUDIT_OPTS
DBA_PRIV_AUDIT_OPTS
AUDIT_UNIFIED_POLICIES
AUDIT_UNIFIED_ENABLED_POLICIES


The content of the audit trail, also depending on configuration and version, can be found in the below views:


DBA_AUDIT_TRAIL
UNIFIED_AUDIT_TRAIL