Wasn't a fan of how clunky RSSGuard felt to work with when I tried it a while ago, but I'm considering trying it out again if it can still do the above mentioned. Did it just work out of the box or did you have to modify with some form of authentication to get KF feeds? I normally use ttrss and there's probably some way of making it work there but the dev is staunchly anti-spoonfeeding and getting it running independently is probably not worth the trouble.I can even get temperamental RSS feeds like private torrent trackers, pages behind CloudFlare and even Kiwi Farms (thanks to KiwiFlare) working, that didn't work elsewhere.
It's surprising how many news sites still have RSS enabled, obviously its probably because of legacy features but its rather convenient, I don't have any particular news site to single out but it helps with keeping up with local news and various tech assorted information (and also some public trackers), if you follow a news site, chances are it likely has an RSS feed hidden somewhere