Create a Power Automate (Microsoft) to loop trough certain pdf's from different folders to sign and save them.

Hi, We want to create an automated system that automatically loops trough documents (pdf files) in several folders (that can be found in a opened folder) on our server, and sign + save (overwrite) them. This all need to happen in the back without the user needing to do anything (or as less as possible). There will be 5 kinds of documents in there, but only the 2 documents with a certain name need to be signed. The signature need to be placed on the first page of document A, above a certain name that can be found in all pdf's. And then also in the other document (document B) on the last page underneath a certain name that can be found in all pdf's. I would like to get this done using the Power Automate app of Microsoft, there we can use code, or certain blocks. We use Foxit Reader as our free pdf for now. If you see other ways to get this done, you can also give any proposals. Let me know if you have intrest to discuss this project in detail.