Indeed is a job posting board used by employers to promote vacant job positions. The platform does not have a direct integration with Indeed, instead Indeed will periodically aggregate jobs from external job boards.
The platform's career site for example can be aggregated by indeed, and the jobs posted on the career site will appear on Indeed when searched.
If you are unsure how frequently Indeed checks the career site it is best to contact Indeed directly.
If you would like to have more control over posting jobs to Indeed, the platform does have an integration with Broadbean that you can use to post jobs to Indeed directly, as well as various other job posting boards.
Note: Indeed have in the past used the career site's 'RSS feed' to automatically pick up new job positions. If you contact the Indeed support team directly and provide the RSS feed, they may be able to use this to automatically create new positions on Indeed.