Configuration 

This extension ships its frontend TypoScript and its backend page TSconfig in two forms: as TYPO3 site sets, and as classic static templates plus page TSconfig files that are selected on a page. Both forms read the very same files, so they configure an installation identically.

Pick one of them per site and stay with it — see Do not combine both for what happens otherwise.

What the sets contain 

The extension ships one content element, so it ships one component set and one aggregate set that depends on it.

Set Delivers
fgtclb/academic-bite-jobs-list The Job list content element: its TypoScript (plugin.tx_academicbitejobs) and the page TSconfig that makes the content element selectable in the backend.
fgtclb/academic-bite-jobs Everything above. This is the set to use unless you deliberately want a subset.

Both depend on fgtclb/academic-base-ctype-group, the set of EXT:academic_base that labels the content element group all academic extensions sort their elements into.

The content element is hidden by default 

EXT:academic_bite_jobs hides its content element for the whole installation and brings it back per component. Whichever of the two mechanisms below you use, it is what makes Job list selectable in the backend again — without one of them the content element is not offered, and existing records keep rendering.

Include the site set 

Add the set to the config.yaml of the site that should offer the content element:

config/sites/my-site/config.yaml (diff)
 base: 'https://example.com/'
 rootPageId: 1
+dependencies:
+  - fgtclb/academic-bite-jobs
Copied!

See also TYPO3 Explained, Using a site set as dependency in a site.

Include static templates 

For an installation that still configures its frontend through sys_template records, the same files are registered as static templates and as selectable page TSconfig files.

Include static TypoScript 

Edit the sys_template record of the site root and add the entry to Include static (from extensions):

Entry Delivers
Academic Bite Jobs: Job list (academic_bite_jobs) The TypoScript of the Job list content element.
Academic Bite Jobs: All components (academic_bite_jobs) Every component this extension ships, in one entry.

Include static page TSconfig 

Edit the page record of the site root, tab Resources, field Page TSconfig, and add the entry:

Entry Delivers
Academic Bite Jobs: Job list (academic_bite_jobs) Makes the Job list content element selectable, and configures its entry in the new content element wizard.
Academic Bite Jobs: All components (academic_bite_jobs) Every component this extension ships, in one entry.

The setting is inherited by every page below the one it is set on.

Do not combine both 

A site that uses the site set and the static template reads the shipped files twice. The site set is applied before the sys_template record, so the second read happens after the site settings and after config/sites/<site>/constants.typoscript — and it resets every constant the extension ships a default for back to that default.

Nothing else is damaged: the Constants and Setup fields of the sys_template record, the page TSconfig of a page and the page TSconfig files selected on a page are all applied afterwards and still win. Use one mechanism per site and the question does not arise.