Yes. ADHD Dude works for many families whose kids have more than one diagnosis, including autism, ODD, anxiety, or AuDHD.
In fact, the strategies are often even more important for these families. Kids with autism are at higher risk of non-emerging adulthood ("failure to launch") if their parents don't have a clear plan to teach them how to function independently. The strategies are also highly effective for kids who fit an ODD profile.
Ryan Wexelblatt, LCSW, has extensive experience and training working with families of children with higher-verbal autism, both in private practice and in special education schools. He is also trained in SPACE (an evidence-based approach for childhood anxiety).
Diagnostic labels can change. What matters is the skills your child builds, so they can recognize how capable they are.