Here in the UK, ADHD drugs are controlled substances. They can only be prescribed as by registered psychiatrists as part of ongoing treatment with patient monitoring. There are not enough doctors qualified to do this, and as a result people who need the treatment are facing year-long queues.
Don't get medical advice from TikTok, and don't form an opinion of a mental disorder and its treatment from TikTok either. The "have you tried mental health walk?" thing is as infuriating as cancer patients getting "have you tried essential oils and yoga?"