I love this.
I found fonts too small for my liking and wanted to filter sources quickly so I created an alternative site using yours as backend just now.
https://news-digest-nine.vercel.app/
Source code: https://github.com/cloudycotton/news_digest
REST API: https://news-digest-nine.vercel.app/hn
If you need help with making the site more pretty, and optimise your backend calls, email is in the profile.
That's an interesting layout! Thanks for sharing, will investigate improving the whitespace utilization.