Flatten massive PDF + Preserve internal/external links

Hello,

This is a follow up to this question : https://community.adobe.com/t5/acrobat-discussions/flatten-pdf-preserve-internal-external-links-script/td-p/14640633

I've managed to run a script. This one : <  this.flattenPages({nNonPrint: 1});  > which I found here:

https://community.adobe.com/t5/acrobat-discussions/how-do-i-preserve-urls-hyperlinks-if-i-am-flattening-a-pdf-form/m-p/9158574#M57203

However, the script only seems to work for the first page of my PDF, which is 678 pages long. I'd want it to work for the entirety of the document, that is, flatten all of it while preserving its many internal/external links in the process.

Thank you.