Ah, it's Pro because it's using Hyper-V.
Seriously this is a killer feature needed by everybody. And specially the non-pro users.
Windows SKU has nothing to do with hardware.
https://www.dell.com/en-uk/shop/2-in-1-laptops/new-xps-15-2-...
Actually I can't seem to configure that directly from dell to come with Pro lol. Seems there's a question about that too.
1: https://www.dell.com/en-uk/work/shop/tablets-and-2-in-1-lapt...
2: https://www.dell.com/en-uk/work/shop/laptops/new-xps-15-2-in...