Please don’t. HN has just the right information density with its small default font size. In most browsers it is adjustable. And you can pinch-zoom if you’re having trouble hitting the right link.
None of the ”content needs white space and large fonts to breathe“ stuff or having to click to see a reply like on other sites. That just complicates interactions.
And I am posting this on an iPhone SE while my sight has started to degrade from age.