To go beyond “The sharper the steering angle the more unstable a bike/scooter becomes” text descriptions you are diving into some pretty heavy theory.

Wikkipedia is a good place to start.

bike dynamics (great article with a lot of details.)

And specifically Trail.

Trail is the term used for steering angle and how it affects stability.

There is a thing called the centering force that is affected by trail. The centering force is the tendency of the wheel to push back to strait when the bars are turned.

The greater the distance between the steering axis intercept and the contact patch, the stronger the centering force becomes.

Hope this helps.