_wp_attachment_metadata is not being added to database when PDF files uploaded

When I upload a JPG or PNG image, a _wp_attachment_metadata value is created in the database, but this is not the case for PDF files.

Is this the normal behavior or should the _wp_attachment_metadata be created for PDF files too?

I'm asking because there's a plugin I have installed that processes PDF files, and it's saying it's not able to do so due to missing metadata for the PDF files.

Here's an example of the difference in my database:

There are no PHP or server errors and I have checked on this with my host, and they said it's not an issue caused by any server settings on their part.

Has anyone had a similar issue and any idea how I can resolve this and get the When I upload a JPG or PNG image, a _wp_attachment_metadata value is created in the database, but this is not the case for PDF files.

Is this the normal behavior or should the _wp_attachment_metadata be created for PDF files too?

I'm asking because there's a plugin I have installed that processes PDF files, and it's saying it's not able to do so due to missing metadata for the PDF files.

There are no PHP or server errors and I have checked on this with my host, and they said it's not an issue caused by any server settings on their part. I've also tried PDFs from multiple different sources, so I don't think it's an issue with my specific PDFs.

Any idea about what might be causing this and what could possibly be done to get the _wp_attachment_metadata values to be created in the database for my PDF uploads?

Thanks!