The last workshop I went to promoted by the staff ND network was supposed to be about neurodiversity in women but about 9/10s of it was navel gazing about the speakers' gender identities and nothing to do with the promoted topics. I kept waiting for the actual discussion to start, and it never did!
I would be inclined to raise the suggestion that this is potentially indirect discrimination of autistic people with gender critical beliefs under the Equality Act 2010, the relevant protected characteristic here being philosophical belief (see the Forstater case for details of how GC beliefs fall under the EA).
Autistic people who believe in gender identity ideology are receiving support with their autism, especially as it relates to their belief in gender identity ideology, whereas gender critical autistic people aren't receiving the same level of support and are left to feel excluded and potentially discriminated against by the very experience of attending training that was meant to benefit them.
Autistic people who don't believe in gender ideology were denied valuable training on autism that their colleagues who believe in gender identity ideology received. It's tantamount to running a training for everyone on autism and then speaking exclusively about how autism affects Christians in the context of their faith.
The way the company has framed this training with no caveat that the content is specific to people who subscribe to gender identity ideology could also potentially lead to instances of direct discrimination under the category of disability or philosophical belief, because if employees have been taught that autism necessarily incorporates beliefs on gender identity, well-meaning colleagues might assume that someone with autism necessarily subscribes to gender identity ideology, which could lead to a gender critical autistic employee experiencing direct discrimination in respect of their disability (through lack of appropriate understanding of autism), their gender critical beliefs (by being othered or bullied), or both.
Furthermore, the workplace is actively cultivating an environment whereby employees are being trained to associate autism with gender identity ideology and to recognise their autistic colleagues needs and behaviour arising from their autism as being inextricably linked to gender identity ideology. This potentially discriminates against gender critical autistic people.
If an employee who's not autistic and doesn't know much about gender identity ideology attends the training in order to learn and better support their autistic colleagues, how would they recognise which parts of the training are relevant to autistic women generally and which are specific to autistic women who believe in gender identity ideology, for example?
I think the main point is that either they are running this training to educate people, in which case they need to be much clearer about differentiating autism from gender identity ideology when discussing these issues in training settings, or they assume that everyone already understands where autism ends and where gender identity ideology begins, in which case why are they even bothering to train anyone if it's already obvious to everyone?