It looks like there are gerber files in the AD reference design / EVAL board.
When looking at the entries, this one looked interesting, because 28 miles (~45km) is a huge distance for a wireless transmitter operating in the 433/868/915MHz bands with all the restrictions. Other ADF720x based modules seem to be more like in the <10miles (<15km) range even when using an additional PA/LNA frontend. This alone made the project look suspicious to me. Seeing no actual code or hardware, puts it in the same "just a design idea but no actual experience" category as many Kickstarter/Indiegogo projects with their exaggerated claims that fail after a couple of years and many thousands or millions of dollars spend. Also seeing the github repository being unchanged for 6 month doesn't make it look any better. And showing how to install a toolchain is not exactly what I excpect from such a project.
The pcb looks nice, but that does not mean it also works. Maybe I am completely wrong, but I doubt this project will end in a success.