Looking at the MAX98360 datasheet, it's quite a complicated IC, but at the end of the day data are transferred through the I2S protocol. So, from the STM32 point of view, you have to use the SAI as I2S transmitter. Read the SAI section of RM to find out the details. There may be examples around, maybe not explicitly for the STM32WB series, but the SAI will be the same or very similar to other series, e.g. the STM32L4.
JW
