Is it possible to change the CPU frequency

For the ESP32, the arduinoespressif32 framework provides soc/rtc.h which we can use to modify the CPU clock, howver that chip runs at 160 MHz or 240MHz.

The XIAO only runs at 48MHz, however I would like to slow it down further, because I need to use an HX711 which has quite a slow (200us) data rate