Doubt about this

I have some strange and sometimes questionable comorbidities. I was diagnosed with ADHD from the beginning and had depression. Later, in another evaluation, I was diagnosed with autism, ADHD, conduct disorder (I met all the criteria in the evaluation) and some mood problems with anxiety (I was even prescribed medication for my hyperactivity and severe anxiety). Of course, I found the existence of these comorbidities strange and even a bit illusory. I wanted to know from you if these comorbidities are common or if there is something wrong or low probability. Is it unlikely that these diagnoses coexist and how prevalent is it? Have you experienced anything like this? A really extreme combination?