Use field data to display in footer

Create the field for the footer (let's call it "Footer"), make it read-only and apply the following code as its custom Calculation script (let's say the input field is called "Text1"):

event.value = this.getField("Text1").value;

Now duplicate that field across all pages (right-click it in Prepare Form mode and you'll see this option), and you're done!

Hi @Mellenix 

Hope you are doing well and thanks for reaching out.

The workflow you are trying to achieve is might be possible using JavaScript. For more information please check the help pages listed below:
https://acrobatusers.com/tutorials/javascript_console/ 
https://helpx.adobe.com/acrobat/using/applying-actions-scripts-pdfs.html

Hope it will help

Regards
Amal