Yes, most people learn and use QWERTZ. In your typical electronics store, you will only find QWERTZ keyboards and notebooks. If you want QWERTY, you have only one option, you have to buy it on the internet. But even on the internet the typical Logitech keyboard for example is hard to find in US-QWERTY in Germany/Europe, because most merchants don‘t have them on stock. In the past, I‘ve even imported US keyboards from the US, because they were and are hard to find here.
It gets even more difficult for notebooks: Any notebook you can buy here in Germany has QWERTZ. Want a notebook with US layout, because you are a developer? Your only options are BTO options from Apple or Lenovo. But even there, you have to be cautious: Dell for example will sell you „English“ keyboard layout notebooks as BTO option, but you won‘t get the real US layout (with a wide return and wide left shift key), but some kind of „International English“ ISO layout with a tall return key and a short left shift key... Lenovo has an „English“ option and thankfully you will get a keyboard layout that really resembles the US layout (but with an Euro key).
Only Apple really gives you „US“ as BTO option, and you really get the real US layout. Funny story, I wrote an e-mail to Apple, over ten years ago, when they didn‘t have US layouts as BTO option in Germany... I think it changed something, because one or two years later, Apple changed it, and you will get real US layouts ever since on their online store.