Never seen it. You could have different sizes on different sides of the hub, but not mixed sizes on same side. Not a hub, but Kona Control Centre headsets had bigger bearings at the bottom vs the top.
We’ll see if I’m allowed to drive (and if so, that far) by then, not sure I’ll be able to bring any bikes (lifting restrictions post surgery may still be in place - yes I know it’s a light bike, but at present a full kettle is off limits).