“Top stories” did the trick:
https://www.theguardian.com/theguardian/mainsection/topstories/rss
A geologist and archaeologist by training, a nerd by inclination - books, films, fossils, comics, rocks, games, folklore, and, generally, the rum and uncanny… Let’s have it!
Elsewhere:
“Top stories” did the trick:
https://www.theguardian.com/theguardian/mainsection/topstories/rss
So, according to this, if you add “rss” to any index page you get a feed.
So clicking “news” and doing that gets me:
https://www.theguardian.com/uk/rss
World news:
https://www.theguardian.com/world/rss
I don’t know if you can combine two but that would trim things down.
That seems good for now. If they want more they can join the Fediverse!