Microsoft talks about major update for windows 11 which come in 2024 thats why people think that windows 12 has been launched. It is possible that Microsoft follows its old trend in which a new window launched in every three years.
Notice that Microsoft officially told about windows 10 that no windows come after windows 10. All updates come for windows 10 but windows 11 has been launched. So that it is possible to launched windows and follow its old trend.
Windows 11 has launched and failed badly because it doesn't support old PC and laptops. Even windows 11 stable version launched which supports old pc and laptops but people dont interested in it and used windows 10.
So, windows 12 launched with different features and AI is so much used in windows 12. It is also possible that this a major update for windows 11.