While testing the analog inputs on the Uno Q, I discovered that A4 and A5 were swapped in the device tree overlay. The corresponding channels can be found in the STM datasheet on page 111.

This took me a while to figure out because they were working perfectly when used as digital inputs. The error only appeared when I used them as ADC inputs.

I also added comments clarifying that the ADC lines refer to the A4 and A5 pins and their corresponding ports.