A child theme is automatically created when the Demo Content is imported in the Setup Guide. A unique child theme is created based on the type of content you import. If you need the raw child theme files you can find them Github.
How to Disable/Enable Popup Functionality on the Sign-Up/Login Links in Jobify and Listify Themes
How to Use the “One-Click Demo Import” Plugin for Jobify Skin Demos
Setting up Contact Form 7 Plugin with Jobify Theme for Job Applications
Different Subscription Types When Using Payment Packages
How to Create a Job Package and Job Subscription Package
How to remove/hide the Related Jobs Widget