Hello. Use two Arduinos: leonardo and mega 2560 with similar shield

For Leonardo in sketch change pins assignment to:

const int SPI_CS_PIN = 9;
const int INT_PIN = 2;

CANHacker successfully connect to arduino, seeing FW version, but there no data from CAN on any speed. Check arduino serial monitor - nothing
Sketch compiled with Arduino IDE 1.8.19

Check this issue, but already have 16MHz oscillator.