Mastodon should support following RSS feeds natively. I know you can setup a bot account with crossposting from RSS, but that'll end up with multiple accounts for the same resource, and in the worst case, the instances running these bots will get abandoned etc.
Following the feeds can bypass the verification step as well since we'll follow the feeds with their native domain e.g. https://www.nytimes.com/rss/... we don't need to worry about "is this nytimes bot actually run by NYTimes?"