I currently use an RSS-to-email service that I operate but I used other services for almost a decade before that. There are a handful available ad supported and paid or you can self-host.
It's got a simple and clean user interface, and it stores the feed in iCloud, so no need for a third-party server application.
It's largely a reimplementation of the Google Reader experience.
For 25 dollars a year you get 500 feeds and one year retention (up to 1000 posts per feed) and you can pay more for a larger number of feeds.
https://github.com/skx/rss2email/
Having the feeds in your mail client makes sorting, and searching trivial. Plus you get the content archived for future reference.
https://github.com/piqoni/matcha
It generates markdown locally but Obsidian is also on my phone so its also mobile.
Flym on Android.