my car Fiat linea 2009 i used to get logs for it and specially knock control and it always shows off in the graph and i had blown my engine twice due to knocking

i just found few days ago that in the csv file it shows that there is knocking but the graph always shows off
https://i.postimg.cc/BvHNJSH9/1.png
https://i.postimg.cc/NMtDM3ky/2.png
also spark advance and injection timing always read 0