You can add yourself as a watcher to the ticket from the ticket view by clicking on the star icon on top of the ticket. Once you are added as a watcher, you would be notified of any updates on the ticket by an email notification. You can find more information about the same from the solution article below:

https://support.freshservice.com/support/solutions/articles/154778-monitoring-important-tickets-by-becoming-a-watcher-