https://reason.com/2023/08/25/government-continues-to-deny-its-role-in-adderall-shortage/
"During the COVID-19 pandemic, the Drug Enforcement Administration (DEA) allowed physicians to prescribe controlled substances via telehealth appointments; at the same time, parents began noticing symptoms of inattentiveness in their kids who were stuck at home attending school over Zoom. As a result, ADHD diagnoses soared among children."
"State and local governments sued the three largest pharmaceutical distributors and Johnson & Johnson over claims that the companies had contributed to opioid abuse and deaths. In February 2022, the companies settled for $26 billion and cracked down on potentially suspicious orders of controlled substances from independent pharmacies. As a result, many pharmacies were limited in the drugs they were able to order; some were banned altogether."
"the DEA declined to raise the limits in 2023 that would allow manufacturers to make more Adderall, even in the face of a declared shortage. Meanwhile, a lawsuit filed by state and local governments caused pharmaceutical distributors to cut off the supply of drugs like Adderall to pharmacies across the country."
This article might be of interest to @freemo
Something I'm going to note is that one drug is not necessarily interchangeable for another.
A drug might have more unpleasant side-effects than another or it might otherwise not be as suitable.