Simply using a Reddit subreddit link to add a subreddit to your RSS aggregator will not work. To make it work, you need to append ‘.rss’ to the subreddit link.
For instance, let’s say we have a link to a subreddit —https://www.reddit.com/r/webdev/
Simply add ‘.rss’ to the end, as shown below.
https://www.reddit.com/r/webdev.rss
You can now successfully add your modified subreddit link to your RSS aggregator.