NUCLEO STM32L432KC: How to use its DAC?
The solution was the order I initiated my functions (initDebug, initADC, initDAC). 

The problem was initiating the ADC function before the DAC function. There's interrupts within the ADC function as soon as the interrupts are enable and the IRQ gets put into work the DAC function never gets called. 

The solutions would be initiating the DAC function first then the ADC or have a function call at the very end that enables all the IRQs.