It'll run anything but if you want to avoid paying the "windows tax" out of principal the best way I've found is to buy one from Ali Express or the like. If you're in the market for the slightly higher end options they also have more varied fabless systems there too. Most of the stuff you find on Amazon is geared towards your average consumer looking for a cheap PC so come with Windows.

I've been using a few mini PCs for things where I needed a headless system, but wanted x86_64 and a little more performance and reliability than a Pi, I settled on N3350 devices like the N4 by TrigKey or the Beelink T4.

Everything I need is supported by Ubuntu server. Excellent little machines.