When exporting an icon using Icon Composer Beta for macOS 26, a light, dark and tinted versions for macOS are created, but I was not able to find how to use them on the Xcode Project. I also tried finding something pointing to that on documentation, but I was not able to find anything.
I see that system apps have light, dark and tinted versions on the first beta of macOS 26, which leads me to believe it would be possible for third-party apps to do that same.