Hello, actually you did nothing wrong. It is simply that the FreeOCR API plan has a 3 page PDF limit, so only the first 3 pages of any PDF are processed.
Thanks for using our PDF OCR software for your work → here is a little workaround that I can share:
For now, our new OCR Engine5 does not have this page limit check yet
It will be added eventually, but this will take some time (other work has priority). So as solution for your project, you can just switch to Engine5 to remove the page limit. This includes the option to create searchable PDF.
Hint: I would use this flag only if you really need it. It increases the PDF OCR time significantly (3-4 times longer).