I've actually been using JUCE with CMake for ages using this project:

https://github.com/McMartin/FRUT

It's meant to convert Projucer to CMake files, but we just create them ourselves. The CMakeLists files come out a bit wonky, but it works.

I did briefly. The CMake integration is... quite strange. It kind of has to be because of how strange the compilation model is for a JUCE project, where all your includes depend on having the same set of preprocessor definitions.

I switched to Juce 6 preview branch last week. It's not without problems but getting rid of the Projucer is amazing. Now you can have a clean CMake setup and you are not stuck with Xcode on the mac.