12M crystal oscillator is used in many places. The 12M crystal oscillator frequency is very widely used like the 32.768K crystal oscillator.
For example, it is used in audio, card readers, and wireless Bluetooth will be used as well as keyboards and so on.
12M crystal oscillators are used in different fields according to different package sizes. Crystal oscillators are used in smart homes, wireless communications, security equipment, medical equipment, etc.