CPU Consumption at 100% - Excel Power Queries (V18)

Hey everyone,

I initially installed V17 a couple of months ago and now upgraded to V18 in the hope that this would solve my way too long loading times. I use my Windows VM just for Power Queries within Excel. Turbo Boost Switcher shows me that my CPU is at 100%, even though I already maxed out all the settings (and also minimized it) for processors and RAM on my MacBook Pro (2021).

A friend runs the exact same excel files and queries on an Intel Mac and yet his loading speed is 10x-15x faster.

Can anyone guide me here? Very desperately looking for the right settings.

Thanks,
Joel