HUB75 is not a "device", just is a common type of the led matrix 16pin connector.
A weak voltage penetrates from the signal pins of the ESP32 and lights the LEDs with the lowest forward voltage - the red ones. This weak supply is no longer enough to turn on the green and blue pixels. This is absolutely normal for such matrices, I have observed this more than once.
In general, all your pictures indicate that you have everything connected correctly and the panel is compatible with the specified library.