Shameless plug, but related, is the Watsi platform[1] I discovered a few months ago through another HN user. You can read the story of less fortunate but alive people and how much need there is in the world for one another. The founder's talk[2], Chase Adam, which made me a supporter, is a must-see. I guess it's time to rewatch it..
My pleasure. I'm also unaware of a software or service since it seems a bit of a too specific usecase.
I'm doing all this (with no cost) using an AWS Lambda function written in Java which is scheduled to be called daily at 7 am. It basically parses some RSS feeds[1] (or parses html[2] when RSS is non-existent), extracts each article content using readability and packages them all in a daily epub[3] (with a TOC) which is stored in a S3 folder. Then a separate endpoint (the one I use in my X4) is taking most recent N S3 objects from that S3 folder and exposes the OPDS. The only downside of this is that the response time takes about 3 extra seconds since it uses a cold start, but response speed is not important to me.
Using 'OPDS as a news library' works incredibly well with my X4, it takes me under 10 seconds to download and open the epub and should work with any e-ink device that can install KOReader (or any other software with OPDS support). And I love that all articles are inside a single epub and I can easily go to another one from the TOC.
It's probably my most useful personal project and I like that by now it follows the 'set it and forget it' principle but in need, since it's written by hand, it's very easy to customize it: filter out AI/war/finance/local-gibberish/whatever articles, add new 'bridges' to websites without RSS, some articles don't respect html guidelines and need some tinkering, etc.
[1] https://watsi.org/
[2] https://www.youtube.com/watch?v=WlT3UhC7NwQ