Assuming your Easy Setup window is set for all formats and frame rates, here’s what I suggest:
Look for the XDCAM EX Setups in: Applications > Final Cut Pro Additional Easy Setups > English
Once you find them, copy them to: Library > Application Support > Final Cut Pro System Support > custom Settings
Relaunch FCP, and they should appear in your Easy Setups.
It worked for me.
Jay