How can I do pagination on a page where there’s no next button?

A workaround you can try (which depends on the page) is to build your workflow based on a pattern of the URL's.

In the case of Linkedin Job search for instance, there's a pattern in the url's

Page 1: https://www.linkedin.com/jobs/search/?geoId=100876405&keywords=product&location=Colombia
Page 2: https://www.linkedin.com/jobs/search/?geoId=100876405&keywords=product&location=Colombia&start=25
Page 3: https://www.linkedin.com/jobs/search/?geoId=100876405&keywords=product&location=Colombia&start=50
Page 4 +: just add +25 to each URL

The workaround would be:
Do a google sheet very quickly and "build those urls"

Run a "scrape data on the background for URLs" action on those Urls.

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Learn about data enrichment in this Youtube Tutorial: Data Enrichment & Scrape data in the background‍

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You can also vote for this canny item to solve cases like these, at: https://bardeen.canny.io/features/p/select-next-pagination-button-when-theres-no-next-button

Now, there's some chases that don't have a URL pattern.

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What you can do in those cases is to run the "Scrape data on active tab" on each page and paginate manually.