Yes, it is possible for a non-autistic individual to have a combination of various neurodevelopmental or mental health conditions, and also identify as asexual and aromantic. Each of the conditions you mentioned—OCD (Obsessive-Compulsive Disorder), ADHD (Attention-Deficit/Hyperactivity Disorder), Tourette's Syndrome, Selective Mutism, ARFID (Avoidant/Restrictive Food Intake Disorder), NVLD (Non-Verbal Learning Disorder), Dyspraxia, and Prosopagnosia—exists independently of autism. While some of these conditions may overlap or co-occur with autism in certain cases, they can also occur in individuals without autism.
Asexuality and aromanticism are sexual orientations and romantic orientations, respectively, and are independent of neurodevelopmental or mental health conditions. An individual can identify as asexual and aromantic regardless of whether they have autism or any of the other conditions listed.
It's essential to recognize that neurodiversity and individual differences are widespread, and people can have unique combinations of traits and characteristics that make them who they are. If someone is experiencing challenges related to any of these conditions or needs support in understanding their identities, it's crucial for them to seek guidance from qualified professionals, such as psychologists, psychiatrists, or counselors, who can provide appropriate assessment, diagnosis, and support. Each condition may require specific interventions or treatments, and a professional evaluation can help determine the most appropriate course of action.