https://docs.oracle.com/en/database/oracle/oracle-database/19/refrn/V-BACKUP_REDOLOG.html
V$BACKUP_REDOLOG
V$BACKUP_REDOLOG displays information about archived logs in backup sets from the control file.
vbackup
https://groups.google.com/g/comp.databases.oracle.server/c/a_g0WV95j1w/m/MvWkjMvjrsAJ?hl=en
Why does an online redolog keeps active after checkpoint completion?
onlinekeepsactivecheckpointcompletion