No it isn’t 


pic.twitter.com/bnGNEiKzW2
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Same here - I'm on a waitlist too :( @Cloudflare it's not here yet :( Only 2 of my domains got it & those were the first 2 I had with added to my name servers on my cloudflare account way back when I was in high school
I've noticed that no @cloudflare sites are serving #http3 at the moment. In loading https://blog.cloudflare.com/ the only assets coming through as HTTP/3 are from Facebook.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.