Honestly OP, I understand what you're trying to say, but the wording in your OP wasn't clear exactly what you meant.
My DD also does this, where she believes that I know exactly what she means, but without her telling me exactly what she means. I think you may have assumed that your OP was self explanatory ? (I've also got decades of experience working with ASD kids and families and in running clubs etc for them)
The problem is funding usually, and an expectation that parents will teach ASD children how to live independently (the same as neurotypical kids get taught).
But because the Autistic Spectrum is so vast and 'individual', what YOU are capable of, won't be the same as someone/anyone else ? So any 'help' would need to be specific to each individual, and that's very expensive (and NOT a 'priority' spend for councils/NHS etc as it only benefits a very small section of society, therefore not the best use of their limited money.
Some charities try to help and some local ASD groups etc might have sessions on this, but most are attended by the more severely affected children, who would not benefit from it at all.
Ideally, more groups like 'social eyes' etc could help with this, but as they're all run by volunteers and not well funded, it would be a bit hit and miss because there's not many groups around the country. I'd like to see NAS do more in the way of classes teaching budgeting/ banking/ money management etc which people could attend.