Yep. See below the link for their RSS feed answer. For tags. It's how I am able to find work so easily on the site. For example, this one.
https://archiveofourown.org/tags/22001796/feed.atom
And here is their FAQ on RSS feeds.
What is a feed and what does it track?
A feed is a way to create your own "news-page" that will collect updates from various tags in one place. You can use a feed to subscribe to most canonical tags, including metatags, relationship tags, and character tags, but not additional (freeform) tags. You'll get all the works connected to the tag in your feed because the canonical tag collects all synonyms of the tag—for example the synonym #SPN tag and the canonical Supernatural tag—together. However, if something changes and the tag you've subscribed to is no longer marked as canonical, your feed will still work, but the tag will no longer collect synonym tags together. A feed will only update when the work is originally posted; it will not provide notifications for works that have been updated by the creator. A feed can be collected in either a dedicated feed reader for personal use, or can be syndicated on sites like Livejournal, Dreamwidth, and Tumblr, which anyone can follow. You can't get email notifications directly from Archive of Our Own (AO3) for any tag.
For more information about canonical tag(s), refer to What is a ‘canonical’ tag? nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq4npmscvwuwsmsjwc5gm22474kpyywq97eu9dza6mzh6pdnmgqvhqkfz5lr (nprofile…z5lr)