Does VEAI on M1 ultra utilise all the 32 neural cores?

Good day! It is my understanding that VEAI uses the neural engine on Apples M1 chip line-up. First of all, is this assumption correct? If it is, can we realistically be looking at a doubling of speeds when upscaling using the M1 Ultra chip (found in the Mac Studio), as it has double the neural cores? Furthermore, has any efforts been put in to optimise the software for this chip? Thanks in advance!