Re: Merge PDF files using Power Automate Desktop - Output File Size is much Bigger
There are several options listed on this thread:
https://superuser.com/questions/34284/combine-merge-pdf-files-in-windows
I recommend choosing 1, such as PDFTK. Once you have everything set up, the bot can simply run a single command line that should merge them without changing them into images.
Failed attempts - If you manually select all, right click, and use the "combine" function, that does not make them images, but I believe this is an Adobe Pro feature, so you probably wouldn't be able to build a bot to do that. I also tried using "Extract PDF file pages to new PDF file," but it had 2 issues: 1) defining the number of pages in each PDF and 2) it always saved the additional pages to a new file, so was ending up sitting in the same boat I started.
Best of luck.