Where are other ADC in pins?

Hi Good day
When analyzing the uORB topics i figured out there are at least 12 ADC values are being shown… but for example on Pixhawk 1 I have only access to 1 3.3V , 2 6V and 2 for voltage and current sensor… where are the others? Is there a way to access to to them even through board level soldering?
or in Pixhawk cube it is even worse. there is only one available and 4 from voltage and current sensor.