Please see the relevant page in the Codex -> https://codex.wordpress.org/WordPress_Feeds
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There are four possible URLs for each of your feeds. Any of these will work.
http://example.com/?feed=rss http://example.com/?feed=rss2 http://example.com/?feed=rdf http://example.com/?feed=atom
If you are using custom permalinks, you should be able to reach them through this usage:
http://example.com/feed/ http://example.com/feed/rss/ http://example.com/feed/rss2/ http://example.com/feed/rdf/ http://example.com/feed/atom/
^ copied straight from the Codex