While I haven't looked too deeply, I think HN might be an example that follows REST. At least I don't see anything in the functionality that wouldn't be easily fulfilled by following REST with no change in the outwards behaviour. A light sprinkle of JS to avoid some page reloads and that's it.

I agree that not many frameworks encourage "true" REST design, but I don't think it's too hard to get the hang of it. Try out htmx on a toy project and restrict yourself to using literally no JS and no session state, and every UI-focused endpoint of your favoured server-side framework returns HTML.