As a young person I worked in a big company which implemented lots of programs for BAME, working-class people etc.
I used to sit in those meetings and think about the people I know who fitted those categories but had a stable happy family life. I was struggling with the effects of being abused as a child by my white, middle-class parents even into my twenties and thirties.
It affects everything going forwards -- self esteem, confidence, friendships, romantic relationships.
Not having the kind of ongoing family life I saw my peers have around me was really difficult well into adulthood, you feel quite isolated and alone as a young adult if you don't have anyone to turn to for advice, reassurance or company from your family. No one to rely on.
It is another layer to consider but I don't see how it could possibly be codified into any kind of equalities legislation. I also don't want to downplay the class and race privilege I do have and people from under-represented backgrounds absolutely do deserve the support they are being given in education and the workplace.
But yes, I think it is under-discussed. If you come from a materially privileged background people just assume you have the relationships that are assumed to go with a middle class background, which just isn't always the case.