John Strang at Children's National has conducted a ton of research on the comorbidity of Gender Dysphoria and Autism Spectrum Disorder (and, ironically, he interviewed me when I applied to grad school a decade ago, even though he was just an external supervisor for my program):
Initial Clinical Guidelines for Co-Occurring Autism Spectrum Disorder and Gender Dysphoria or Incongruence in Adolescents
Increased Gender Variance in Autism Spectrum Disorders and Attention Deficit Hyperactivity Disorder
Evidence suggests over-representation of autism spectrum disorders (ASDs) and behavioral difficulties among people referred for gender issues, but rates of the wish to be the other gender (gender variance) among different neurodevelopmental disorders are unknown. This chart review study explored...
link.springer.com
“They Thought It Was an Obsession”: Trajectories and Perspectives of Autistic Transgender and Gender-Diverse Adolescents
Despite research exploring autism in gender-diverse adolescents, no studies have elicited these individuals’ perspectives. In-depth interviews with 22 well-characterized autistic gender-diverse adolescents revealed critical themes, including: recollections of pre-pubertal gender nonconformity...
link.springer.com
Worthwhile reading, solid science, and these articles are a highlight among his others for your presenting concerns.
And for normalization's sake, I work at a university counseling center and in the last couple years the need for better tools for making this differential has skyrocketed.