I can scroll horizontally on my touchpad, but on a mouse it doesn't work. Horizontal scroll wheels are rare (the Logitech Master series has them, but that's about it). Most apps allow you to hold ctrl while using the scroll wheel to scroll horizontally. Some implement some kind of drag-mechanic, but that feels incredibly awkward with a mouse and is unusable with a touchpad.
On some mice they do, and it's a really useful feature. But it's fairly niche and mostly on the more expensive mice. I would feel pretty confident betting that over 99% of Windows users don't have a tiltable scroll wheel.
Even though I have trackball with tilt wheel (MX Ergo), I noticed that I never use them. When I should scroll vertically, I just middle click and move cursor, or grab scrollbar and drag. Maybe because tilting wheel isn't comfortable way to scroll.
