For children of all ethnicities, races and abilities, surely a strong sense of inclusivity of others is what we strive to encourage in them?
Play is how kids process their lives and worlds. And learn compassion and critical thinking.
When you expose kids to other cultures, and help them see the world through someone else’s perspective, it helps them develop empathy.
Dolls that look like other people help to develop that empathy, and it helps give them a healthy idea of their place in the world.
If early years kids don't see themselves represented, why wouldn't they feel less valued? Similarly, why wouldn't kids in groups always represented get that same message: that the 'other' ones don't belong as much in their lives?
So, yeah, surround children with as many different dolls of all skin colours as you can, IMO. We're in 2023.