I manage to make it work on another mac. The thing is that the build creates a folder with a name that ends with .vst3 that contains several files. It appears that, when put on a mac, the icon switch from a folder to a file but it still is a folder. This is that folder that as to be added to the library/audio/plugIns/vst3 path. But after there was indeed an apple message that says that apple cannot verify the security of the plugIn and thus, it won’t launch it. To counter that, there exists a line (sudo spctl --master-disable) to be put on the terminal that allows a new security parameter in macOS that can be checked to ignore the security. Obviously the right way to do it would be to sign the plug-in with apple ID I guess but I couldn’t do that. Thanks for the help !
That topic was also helpfull if you want to compile a vst3 for version of mac that you don’t have : Mac Plugin not available on Logic - MacOSX and iOS - JUCE