I too use Freshrss. I use a lot of the feeds from https://www.trackawesomelist.com/ which tracks all the Github Awesome lists.

The hackaday feed is pretty interesting if you’re into that space

Slashdot. Ars. Bleeping computer. Ikeahacker.

Been doing feeds on fdroid

I use it for all kinds of stuff, a lot of it Dutch. I have feeds on general news, some tech stuff, some Gizmodo tags for topics I enjoy, guitar and music news, and daily comics. The feeds I follow have been trial and error. Some of them have way too much articles and they get annoying. At that point I remove them and look for something else.