macOS is available not only on Apple processors but also on Intel processors. This applies to any MacBook released before the M1.
Rosetta is not a Windows emulator. The architecture of Apple processors is different from Intel processors (ARM vs x86), and Rosetta compiles x86 code into ARM code. Game can run on both x86 and ARM (but only on ARM with Windows (Qualcomm) and Android). So, the game is still available for macOS, even with the M1, but with Rosetta, which is available on any MacBook with an Apple processor natively.