Yes, RSS feeds are available for a blog, just append /feed to the end of the link. For example, here’s the feed for one of Matt’s blogs: https://write.as/matt/feed
Pagination links, e.g., for page 2 of Matt’s blog: https://write.as/matt/page/2
Regarding hashtags, cjeller1592 wrote a little utility that will list all the hashtags for your blog, it’s at http://wa-tags.glitch.me/ His forum post explaining it is here