Analog Devices provides the CN0566 Phaser Schematic, PCB Layout, Bill of Materials, Gerber files, and Casing files online at “EVAL-CN0566-RPIZ Design & Integration Files”(Downloads Form | Analog Devices). The design files are in Allegro format, so has a method been developed yet to import the Allegro design into KiCad, or to convert it so the design can be updated in KiCad?
You can import to EasyEDA Pro first, and then to KiCad: Import Allegro/OrCad | EasyEDA Pro User Guide
Or to Altium Designer first if you have an Altium Designer license.
If there’s only binary files, you’ll need an Allegro license to convert it to ASCII in any case.
Note that the link you posted requires filling a form to download.
I will look at this today to see if it works for converting the CN0566 Allegro Project.brd to something that can be read by EasyEDA and then KiCad. The download file is 15.3 MB, and the CN0566 Allegro Project.brd file is 30 MB after it is unzipped, so it is too large to send.
If you only need the PCB for modification (e.g., casing, mechanical constraints), you can import Gerber + drill files into KiCad. Recreate netlist manually if needed, or reverse-engineer the schematic.
Tools like GerbView in KiCad can assist with this.