Hi @qasimidl ,
You can back up a service application by using the SharePoint Central Administration website or Microsoft PowerShell (Please click the link to view the detail steps).
You can back up a SharePoint Server farm by using the SharePoint Central Administration website, Microsoft PowerShell, or SQL Server tools.
Note: If you are backing up for the first time, you must use the Full option. You must perform a full backup before you can perform a differential backup. Some service applications always require a full backup. For these service applications, the system performs a full backup even if you select the Differential option.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.