Nextcloud News support
Hello and thank you for Feeds, it really is great!
Sometimes people want to read news on their computer, then need to move and want to browse it on their mobile phone. Several services exist to allow synchronization of the state of the news feeds (i.e. for a given feed, which item has been read or not).
Nextcloud has an app called Nextcloud News, which offers a REST API. It completely covers that issue.