This seems all handled within https://github.com/ClassicPress/ClassicPress-APIs, but I am not sure how to achieve the following:
Update the list to reflect the latest petitions and not those that are several months old, without losing the older petitions either.
While it surely would be easy to just swap URLs here https://github.com/ClassicPress/ClassicPress-APIs/blob/14c1bb28081de8abeffb39bc15cdda05788049c3/v1/features/1.0/index.php, that wont do, because the discourse petitions are under different structure
Some of the links are clear how to be replaced, but the whole query in the API is based on Fider, see
Is there an easy way to update that widget, without losing old petitions and including new ones?