I think you have to use the @layer base directive for that… Per the documentation:
If you want to add your own default base styles for specific HTML elements, use the
@layerdirective to add those styles to Tailwind’sbaselayer.
I think this is also cross-referenced from the docs on the page you posted.
BTW, you can also look at the typography-plugin source code since they do basically the same thing - or open a discussion on the Tailwind repo if that’s the case.
