I use NetNewsWire on my iPad and Feeder on my Android phone to read RSS feeds from multiple sites (including Lemmy and Kbin). I also use it to monitor niche sub-reddits so I can give Reddit as little traffic as possible.
I guess it was inevitable that Reddit would know many are doing this and begin to kill RSS feeds. I’ve noticed the past few days that my feeds were not being updated very often, if at all, even though the feed appears to still be there.
This started a few weeks ago, apparently:
https://www.reddit.com/r/bugs/comments/14z44nw/rss_feeds_are_broken_for_most_subreddits/
Update on this issue. Reddit has apparently started to enforce login requirements for RSS feeds. Since most newsreaders have elected to not pay Reddit for API access, most of them will likely stop working.
However, there is a workaround for now - you can use old.reddit as the feed url, so something like https://old.reddit.com/r/technews.rss will work, for now.
I expect Reddit to also kill old.reddit at some point as they still have a couple of bullets in their gun to shoot off the rest of their foot.