You are right that Google no longer publicly shows RSS feeds for News searches. But there's a basic URL format that should continue to work.
If my search topic is "education", my search URL should look like:
https://news.google.com/news/section?cf=all&ned=us&q=education
Replace:
value of ned
(probably stands for 'news edition'), i.e. us
with the appropriate country code that's relevant to you. E.g. uk
(not gb
for UK), in
(India), etc.
value of q
(probably stands for 'search query'), i.e. education
with your search term. Combine multiple words with a plus sign, e.g. education+policy
(if your search is for 'Education Policy').
Now the RSS feed button in your browser should've become active because an RSS feed is available for the page. It shows 10 latest news items in the feed, not 5. And the RSS feed URL would look like this:
https://news.google.com/news/feeds?cf=all&ned=us&hl=en&q=education&output=rss
Conclusion: RSS feeds aren't available for actual searches, i.e. typing in the search box on Google. You'd have to do it like this.
(PS: Credit goes to the question itself. It would not have occurred to me otherwise.)