I appreciate the lack of a reverse proxy in front. While I love the various "website hosted on X" projects they end up in reality just served by CloudFlare. Which is fine since you don't want your C64 or vape pen or whatever to explode. It's just less "hosted on X" and more "single HTML page served by CloudFlare".
It depends on the cache settings but by default CF doesn't cache HTML
It looks like it's proxied if you come over IPv4 - which the vast majority of "customers" likely do.