Backup history not showing - Sql server 2012

Sounds to me like someone did a purge of backup history. No good backup routine goes without it although it should leave at least a month (IMHO). Please see the following for what someone may have executed or may have added to some code somewhere.

https://docs.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-delete-backuphistory-transact-sql?view=sql-server-ver15