Employees are not visible in job data / Personal data through peoplesoft front-end

Check if you have enabled the future effective dated rows for the Security
Access Type.
Set Up HRMS >> Security >> Core Row Level Security >> Security Access Type
>> Security Type Table
Also check the HRMS Security Install Settings where you configure the
actions that trigger future effective dated security rows.
Set Up HRMS >> Security >> Core Row Level Security >> Security Installation
Settings >> Security Install Settings

Note: This is based on HRMS 8.9.