There are several ways to view a candidate who previously applied to your jobs.
Method 1: From people module
This method will give all details about the candidate's profile and history in general
1- Click on People-> My company
2- Click on Filter then search by any field you want about this candidate then Apply
3- Locate the candidate you want, click to see all details about this candidate
Method 2: From jobs module
This method will give all details about the candidate's history with respect to a specific job
1- Click on jobs
2- Locate any job this candidate applied to before, this will take you to the job dashboard
3- Click on filter or quick AI search to find your candidate