As an adult ADHD, and with a child on the spectrum, I 100% agree.

I know, and practice daily, the soft/gentle verbal approach first to detail why I am unhappy with their actions, and the potential outcome of their actions. I want my kiddo to understand the reasoning, so that when my kiddo becomes an adult, he can have a happy and healthy life.

If my kiddo were to be on their phone until way past their bedtime, it would start off gentle at first (verbal only), and if the action continued despite my request and explanation, then my reaction slowly escalates. The next step would be disabling the wifi. Then, if it kept going, enforcing parental controls to limit the available hours of use. Lastly would be taking the phone away.