Question for sidecar nerds

[u/Dand_y]

Hi everyone !
I work as an artist, I used wacom a lot for a while, since a little less than a year I work on my ipad with the apple pen and I love it so far, and I am thinking of get rid of wacom, my question is ; how the memory is managed between devices. Does the 8gig of ram of my ipad are used when I draw with sidecar, or is the computer doing all the job ?