On Monday, a backup administrator found out that some backup jobs were missing from a...

To roll back the configuration database to Friday's state, the backup administrator should use the 'Restore' mode available in Veeam Backup & Replication. This mode allows for the entire configuration backup to be restored, which includes the job settings and history, and brings the configuration database back to the state it was in at the time of the backup.References:

Veeam Backup & Replication User Guide: Configuration Backup and Restore

Veeam Help Center: Configuration Restore