The option in Admin Center > Manage Recruiting Settings to edit the message on Application Submission is not available.
SuccessFactors BizX - Recruiting Management (RCM)
To have this option available, it is required to enable the switch of ‘Complete Profile before Application’ in Provisioning Company Settings.
Please raise an incident with SuccessFactors RCM Cloud Product Support to enable the above mentioned switch.
Once it is performed, the “Application Submit Page” option will be available in the Recruiting Settings.
RCM-30995 Thanks for Applying Application Submit Page Application has been sent b1605 Complete Profile before Application , KBA , LOD-SF-RCM , Recruiting Management , How To