The job name in the Applicant tab comes from the Job Title field in the Job Information section.
It doesn't use the name from the Vacancy tab in Vacancy Details.
To add a job title to the Applicant tab, follow the steps below.
Click Access Button
then click ATS.
Click the Vacancies tab, then double-click the relevant vacancy.
Click Job Information, then correct the Job Title field.
Click Save.
📌Note: If the Job Title field is blank, the dropdown list in the Applicants section will display the actual vacancy name.