its been a while since i checked out mine, but the ones i do still sometimes read are
hackernews frontpage: hnrss.org/frontpage low-tech magazine: solar.lowtechmagazine.com/feeds/all-en.atom.xml xkcd comic: xkcd.com/rss.xml oglaf (often nsfw): www.oglaf.com/feeds/rss/ and k6bd (a long comic, highly recommend starting at the beginning): killsixbilliondemons.com/feed/
they might not be the best for you, though, you should try looking for if the websites you read still have an rss page
axum@lemmy.blahaj.zone 1 day ago
Ars technica still supports rss by topic
arstechnica.com/rss-feeds/