Is it possible to get another current sensor on MAMBA H743 mk4?

Sorry, this might be a stupid question but I am not good enough to understand a fc’s basic.
I am building a quad-x8 drone using two of the same 4 in 1 escs and I really want two current sensor as I observed the top 4 motors have higher rpm than the bottom 4, so using a virtual current sensor that duplicates the one real current sensor will not be accurate.
I am thinking if I could remap a pad (like the led pad or an uart) to another adc input which I could solder the current sensor wire from the second esc to.
Any help is appreciated.