It is advised to monitor both your DataCore Swarm resources and Veeam's ability to leverage them as you would with any storage target you rely on to store your backups. A combination of DataCore Swarm Monitoring (Grafana/Prometheus solution) and Veeam's monitoring capabilities (the Statistics tab in the Jobs node of the Veeam Management Console or more advanced options such as Veeam One Reporter) helps to keep the environment healthy.
Veeam Reporting
See here for more information about Configuring Veeam ONE Reporter.
See here to know Veeam backup & replication alarms.