Changing Jobs count in the External Career Site from Job Categories to Job Function

Summary:

Currently, our splash page shows All Jobs (x) followed by the count of jobs per Job Category / Job Family:

How can we change it such that it will show the count of jobs based on Job Function instead of Job Category / Job Family?

I have checked the career site configuration > pages > Splash page, but I do not see an option to change this section:

Is there any configuration elsewhere where we can change this? Thank you.