I gave my 16yo ADHD kid an mp3 player with hours of “ADHD focus” music on it.

It’s proven very useful a few times where a few ND-unaware teachers have confiscated phones that the ND kids use to help them focus.

They don’t get it to use it whenever they want but there are some situations where they are allowed to use it and where having a phone is tricky given the lack of trust some teachers have.

Old school technology fallbacks are sometimes useful. Who knew.