The Bottom2 module includes a SPM1423 MEMS microphone, which uses:

GPIO0 (BUS pin 24) for the clock signal (CLK)

GPIO34 (BUS pin 26) for the data signal (DAT, digital output)

The Audio Module, based on the ES8388 codec, uses:

GPIO0 (BUS pin 24) for I2S_MCLK

GPIO34 (BUS pin 26) for I2S_MAIN_DIN

This creates a fundamental hardware conflict on the I2S bus.
The Core Conflict

Two independent devices attempt to drive the same data line:

The ES8388 (M144 Audio Module) uses GPIO34 to send digitized audio data from its ADC (line-in or microphone) to the ESP32 via I2S.

The SPM1423 (Bottom2) uses the same GPIO34 to output PDM audio data from its internal MEMS microphone.

More about this here: I2S Bus Conflict Between M5Stack Core2 Audio Module and Bottom2

Thank you,
Adrian