There seems to be a conflict with the availability
The release was pulled. I believe they found an issue with it.
I have it running no my hub. The dashboard has multiple issues. Not a deal breaker for me because I don't use dashboard much d/t Homebridge and Alexa in my house. The fixes in RM and ML were what I was eagerly waiting for and so far so good, but I have been sick and not tested it much. This is what happens when I click on a tile's history. Same in Safari on IOS 13.1 and on Windows using Chrome or Firefox. I also have noticed that the "x" to exit out of the tile ends up behind the setting gear on IOS, but isn't an issue with a Windows browser. Other than that, I like the new look.
I should mention that all of my rooms in dashboard are there; no issues with things not being populated. I did just set these up over the past week on 184.108.40.206 as I had previously deleted the app while troubleshooting my hub.
It’s been re-released about an hour ago: