One I follow is the KDE Blog (https://blogs.kde.org/index.xml#feed)

https://terminaltrove.com/new.xml

I see most are covered but I have a couple more:

Fedora Magazine

It’s FOSS

Bazzite

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Phoronix and Gamingonlinux are awesome!

A few I have not mentioned yet

https://lwn.net/

https://linuximpact.com/

https://www.linuxserver.io/blog.atom

https://www.linuxuprising.com/

https://www.osnews.com/

This one’s pretty good

i love https://thelibre.news/

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Btw feeds makes more sense than rss feeds, all feed readers also take atom feeds ;)

Slashdot

On The Metal

This Week In Linux

Destination Linux

[https://linuxgamecast.com/feed/lgcweeklyaudio](Linux Game Cast)

Arch Linux Security Advisories

Pointieststick, Itsfoss, GamingOnLinux, KDE Blogs

https://omgubuntu.co.uk/feed