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There is no such standard functionality on the site. You would need a server side implementation that responds to the Feeds bots requests and produce an RSS feed from the Hot Network Questions list.
I've created a proof of concept in Glitch here (and find the implementation here)
The Glitch app...
Stack Overflow provides the total number of pageviews per question - but it doesn't tell you if those views are historical or if the question is still current. How can I find the current top questions?
