Could you please confirm whether you tested I2S master or slave?
Have you tested with some other pins? which pins?
I tested I2S master in 3 different pin configuration :
Config n°1 : clock : Pin 16, World select : Pin 17, Data in : Pin 02 and Data out : Pin 04
Config n°2 : clock : Pin 04, World select : Pin 02, Data in : Pin 17 and Data out : Pin 16
Config n°3 : clock : Pin 25, World select : Pin 02, Data in : Pin 29 and Data out : Pin 04 (I used I2C pin but I did not use the I2C bus).
With this 3 configs, i always had not output signal from my cyw20719 chip.
I have also test I2S slave in same 3 configs. And i tri to fix pin 16 as it's described here : Re: P16 on CYW20719
This two tests don't work too.
Could you please share your project for review?