6th graders still hunt and peck after years of having devices, how did you actually break the habit
Devices aren't the problem. These kids have had chromebooks since 2nd grade and some of them are surprisingly fast with two fingers. The problem is nobody ever explicitly taught them how to type, so they developed their own system and now it's completely locked in. Telling them to use home row is like telling someone to switch their dominant hand. They try for 30 seconds and then revert the moment they stop thinking about it.
The kids who got any kind of structured typing instruction somewhere along the way type circles around the others, not just in speed but in accuracy and posture. It's immediately obvious which students had a proper keyboarding curriculum at some point and which ones were just handed a device and left to figure it out.
Looking for approaches that have actually worked for breaking this habit at the middle school level, especially with students who feel like they already know how to type because they can produce words quickly. That confidence is actually part of what makes it hard.