No, but you can do this in Friendica which is also part of the Fediverse.
You can follow RSS feeds in Friendica by just pasting the feed address into the search box and then clicking "Follow". Posts from the feed will start showing up in your Home timeline as if they were from a Fedi account, you can even share them.
By the way, Friendica accounts can follow Mastodon accounts, and Mastodon accounts can follow Friendica accounts.